Model problems — Indonesia

Model Problems: The Same Symptom Means Something Different on Every Bike

100 guides that start with the machine you own, not a generic list. Each one explains how the symptom behaves on that model, what to check first and when to stop.

Guides100 Models18 Updated13 November 2026
Symptom library Motorcycle encyclopedia Workshop services
Motorcycle workshop bench with tools, representing the BikesIndo diagnostic library.
Model first — the machine decides which test comes before the parts.

A Honda BeAT that will not start and a Kawasaki ZX-25R that will not start are not the same diagnosis. One has an air-cooled single, an ACG starter and a CVT; the other has an inline-four, four throttle bodies and a manual gearbox. The symptom is shared. The test order is not.

These pages are organised by model and symptom for that reason. Each guide names the configuration that matters, describes the safe checks an owner can make, then sets out the workshop tests that separate a cheap fault from an expensive one. Nothing here replaces a mechanic with the machine in front of them, but it should make the conversation shorter.

Model names and engine layouts are used to organise the guides. Where a model year or variant changes the answer, the article says so. No article claims a failure rate, a recall, a service interval or a repair price.

Start here Six common questions

Each guide answers one search: why this model behaves this way, what an owner can check safely, and what a workshop should test next.

Line diagram of a key, starter circuit and battery for the Honda BeAT starting system.Starting

BeAT8 min

BeAT starting fault, in test order

The BeAT is simple, but a no-start can come from the battery, an interlock, the fuel pump or the ignition. This guide separates them before any panel comes off.

Read the diagnosis
Line diagram of an idle waveform, coolant circuit and CVT for Honda PCX 160 stalling diagnosis.Running

PCX 1608 min

PCX 160 stalling, pattern by pattern

The PCX 160 stops at junctions by design when idle stop is active. A real stall leaves different clues, and the pattern tells you where to look.

Read the diagnosis
Line diagram of a CVT clutch, belt and variator for Yamaha NMAX 155 vibration diagnosis.Drivetrain

NMAX 1558 min

NMAX judder, source by source

The NMAX spends a lot of its life at low speed, which is exactly where a tired CVT shows up. A judder from a stop is a wear signal, not a reason to replace the belt blindly.

Read the diagnosis
Line diagram of a chain, sprocket and alignment check for Yamaha R15 chain diagnosis.Drivetrain

R158 min

R15 chain noise, checked in order

The R15 puts more load through its chain than a commuter, and a slightly slack chain becomes audible under acceleration long before it fails.

Read the diagnosis
Line diagram of a carburettor float bowl, jets and spark plug for Kawasaki W175 diagnosis.Fuel

W1758 min

W175 carb, rich or lean

A carburettor tells you what it is doing through the spark plug, the exhaust and the way the engine picks up. Read those before removing the bowl.

Read the diagnosis
Line diagram of a battery, regulator and current meter for Suzuki GSX-R150 drain testing.Electrical

GSX-R1508 min

GSX-R150 battery drain, three causes

A small battery, a keyless option on some variants and a busy accessory market. A flat battery is usually a load, a charger or a worn cell.

Read the diagnosis

100 guides

Brand

Model

Symptom

Library All guides

100 guides, grouped by the machine

Choose a brand, narrow to a model, then pick the symptom. Every card is a full page, not a placeholder.

01 Brand

Honda

30 guides across 5 models.

HONDA BeAT

Honda BeAT 110

109.5 cc, air-cooled sohc single, pgm-fi, cvt.

Encyclopedia 6 guides
Line diagram of a key, starter circuit and battery for the Honda BeAT starting system.Starting

BeAT8 min

BeAT starting fault, in test order

The BeAT is simple, but a no-start can come from the battery, an interlock, the fuel pump or the ignition. This guide separates them before any panel comes off.

Read the diagnosis
Line diagram of an idle waveform and throttle body for Honda BeAT stalling diagnosis.Running

BeAT8 min

BeAT stalling, pattern by pattern

A BeAT that dies at a junction, only when hot, or only after rain is giving you three different clues. The pattern is the diagnosis before the parts list.

Read the diagnosis
Line diagram of a battery, charger and current trace for Honda BeAT parasitic drain testing.Electrical

BeAT8 min

BeAT battery drain, three causes

A BeAT battery that keeps going flat is either worn out, not being charged or losing current while parked. The tests are cheap; the guesswork is not.

Read the diagnosis
Line diagram of a CVT variator, belt and clutch bell for Honda BeAT vibration diagnosis.Drivetrain

BeAT8 min

BeAT CVT vibration, source by source

A BeAT that shudders away from a stop is not always asking for a new belt. The clutch, rollers, variator faces and mounts each produce a different vibration.

Read the diagnosis
Line diagram of an acceleration curve and throttle body for Honda BeAT power-loss diagnosis.Performance

BeAT8 min

BeAT acceleration loss, split by cause

A BeAT that has lost its pull is either not making power or not putting it down. The test is to find which side of the engine-to-wheel chain is failing.

Read the diagnosis
Line diagram of a fuel tank, injector and consumption trace for Honda BeAT fuel-use diagnosis.Fuel

BeAT8 min

BeAT fuel use, cause by cause

Fuel consumption complaints are usually about a change, not a brochure figure. Measure the change properly, then find the system that explains it.

Read the diagnosis

HONDA Scoopy

Honda Scoopy 110

109.5 cc, air-cooled sohc single, pgm-fi, cvt.

Encyclopedia 6 guides
Line diagram of a scooter key, battery and brake interlock for Honda Scoopy no-start diagnosis.Starting

Scoopy8 min

Scoopy no-start, in order

The Scoopy hides its electrics under styled panels. The no-start checks start with what you can hear and see, not with a screwdriver and a panel clip.

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Line diagram of air-cooled cylinder fins and a cooling fan for Honda Scoopy overheating diagnosis.Cooling

Scoopy8 min

Scoopy heat, air-cooled checks

The Scoopy has no radiator and no coolant. Overheating means the air path, the oil or the load has exceeded what the engine can shed. The checks are different.

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Line diagram of a battery, terminals and charging circuit for Honda Scoopy battery diagnosis.Electrical

Scoopy8 min

Scoopy battery faults, tested

A Scoopy battery problem can be the battery, the terminals, the charging system or the idle-stop load. The order of testing matters more than the brand of the replacement.

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Line diagram of a CVT belt, variator and clutch bell for Honda Scoopy noise diagnosis.Drivetrain

Scoopy8 min

Scoopy CVT noise, by sound

A chirp at take-off, a squeal at speed and a rumble on the overrun are three different CVT faults. Identifying the sound is half the diagnosis.

Read the diagnosis
Line diagram of idle waveform, air filter and spark plug for Honda Scoopy rough idle diagnosis.Running

Scoopy7 min

Scoopy rough idle, cause by cause

An air-cooled single should idle with a steady, even beat. A Scoopy that hunts, shakes or smells rich at a stop is telling you where to look first.

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Line diagram of an acceleration curve and CVT for Honda Scoopy poor acceleration diagnosis.Performance

Scoopy7 min

Scoopy slow acceleration, split by cause

A Scoopy that has lost its sparkle is usually losing drive somewhere between the piston and the road. The order of checks keeps the repair cheap.

Read the diagnosis

HONDA Vario 125

Honda Vario 125

124.8 cc, liquid-cooled sohc single, pgm-fi, cvt.

Encyclopedia 6 guides
Line diagram of a key, battery and start circuit for Honda Vario 125 no-start diagnosis.Starting

Vario 1258 min

Vario 125 no-start, in order

The Vario 125 packs a liquid-cooled engine and modern electrics into a compact body. A no-start is usually a supply or interlock fault, not a mechanical failure.

Read the diagnosis
Line diagram of coolant flow, idle waveform and CVT for Honda Vario 125 stalling diagnosis.Running

Vario 1258 min

Vario 125 stalling, pattern by pattern

A liquid-cooled scooter can stall for reasons an air-cooled one cannot. Coolant, the radiator fan and the idle control all belong in the diagnosis.

Read the diagnosis
Line diagram of a keyless receiver, battery and current meter for Honda Vario 125 drain testing.Electrical

Vario 1258 min

Vario 125 flat battery, three patterns

A keyless scooter never fully sleeps. A Vario 125 battery that dies while parked is losing capacity, losing charge or feeding a standby load that is larger than it should be.

Read the diagnosis
Line diagram of a CVT variator, belt and wheel for Honda Vario 125 vibration diagnosis.Drivetrain

Vario 1258 min

Vario 125 vibration, located by frequency

Not every shake comes from the CVT. A Vario 125 gives three different vibration signatures, and the test ride can tell them apart before a panel is removed.

Read the diagnosis
Line diagram of a wheel, CVT and radiator for Honda Vario 125 acceleration diagnosis.Performance

Vario 1258 min

Vario 125 lost pace, in order

A liquid-cooled 125 should hold its pace in traffic. When it stops, the cause is usually drag or drive wear before it is the engine.

Read the diagnosis
Line diagram of a fuel tank, CVT and consumption trace for Honda Vario 125 fuel-use diagnosis.Fuel

Vario 1258 min

Vario 125 fuel use, checked in order

Fuel consumption is a ratio, not a feeling. Two measured tanks and five cheap checks will find most Vario 125 complaints before a scanner is needed.

Read the diagnosis

HONDA Vario 160

Honda Vario 160

156.9 cc, liquid-cooled four-valve sohc single, pgm-fi, cvt.

Encyclopedia 6 guides
Line diagram of a radiator, fan and coolant circuit for Honda Vario 160 overheating diagnosis.Cooling

Vario 1608 min

Vario 160 overheating, step by step

The Vario 160 has a radiator, a fan and a coolant pump. Overheating is a system fault, and the first rule is never to open the cap when hot.

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Line diagram of a CVT clutch, belt and variator for Honda Vario 160 shudder diagnosis.Drivetrain

Vario 1608 min

Vario 160 shudder under load

The Vario 160's extra torque exposes a tired CVT sooner. A shudder that appears only with a passenger is a different clue from one that appears at a steady speed.

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Line diagram of a battery, keyless receiver and charging circuit for Honda Vario 160 battery diagnosis.Electrical

Vario 1608 min

Vario 160 battery, load by load

A Vario 160 asks more of its battery than a simple commuter. Idle stop, keyless entry and accessories all draw current that the charging system must replace.

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Line diagram of a keyless fob, battery and start circuit for Honda Vario 160 no-start diagnosis.Starting

Vario 1608 min

Vario 160 no-start, three branches

The Vario 160 gives you three clues in the first minute: panel brightness, pump prime and brake light. Use them before removing a panel.

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Line diagram of an idle waveform, coolant circuit and CVT for Honda Vario 160 stalling diagnosis.Running

Vario 1608 min

Vario 160 stall or idle stop?

The Vario 160 can switch off at a junction by design. A stall is different, and the difference decides whether you need a workshop or the owner's manual.

Read the diagnosis
Line diagram of an acceleration curve, CVT and radiator for Honda Vario 160 power-loss diagnosis.Performance

Vario 1608 min

Vario 160 lost pace, in order

The Vario 160 has enough power for city traffic and a passenger. If it feels flat, the ratio and the rolling gear usually explain it before the engine does.

Read the diagnosis

HONDA PCX 160

Honda PCX 160

156.9 cc, liquid-cooled four-valve sohc single, pgm-fi, cvt.

Encyclopedia 6 guides
Line diagram of a smart key, battery and start circuit for Honda PCX 160 no-start diagnosis.Starting

PCX 1608 min

PCX 160 no-start, in order

The PCX 160 hides its battery and fuses behind bodywork. The no-start checks start with the key, the panel and the pump, not with a screwdriver.

Read the diagnosis
Line diagram of an idle waveform, coolant circuit and CVT for Honda PCX 160 stalling diagnosis.Running

PCX 1608 min

PCX 160 stalling, pattern by pattern

The PCX 160 stops at junctions by design when idle stop is active. A real stall leaves different clues, and the pattern tells you where to look.

Read the diagnosis
Line diagram of a keyless receiver, battery and current meter for Honda PCX 160 drain testing.Electrical

PCX 1608 min

PCX 160 battery drain, three causes

A keyless PCX never fully sleeps. A flat battery is either a worn battery, a charging fault or a standby load that is larger than the design allows.

Read the diagnosis
Line diagram of a CVT clutch, belt and variator for Honda PCX 160 vibration diagnosis.Drivetrain

PCX 1608 min

PCX 160 judder, source by source

The PCX 160 is heavier than a small commuter, so the clutch works harder at low speed. A judder from a stop is a wear signal with a short list of causes.

Read the diagnosis
Line diagram of a radiator, fan and coolant circuit for Honda PCX 160 overheating diagnosis.Cooling

PCX 1608 min

PCX 160 overheating, step by step

The PCX 160 is liquid-cooled and often ridden at sustained speed. Overheating is a system fault, and the first rule is never to open the cap when hot.

Read the diagnosis
Line diagram of a fuel tank, CVT and consumption trace for Honda PCX 160 fuel-use diagnosis.Fuel

PCX 1608 min

PCX 160 fuel use, cause by cause

The PCX 160 is a heavier scooter with a larger engine. Its economy depends on how it is ridden, how it is loaded and whether the CVT and cooling system are healthy.

Read the diagnosis

02 Brand

Yamaha

30 guides across 5 models.

YAMAHA NMAX 155

Yamaha NMAX 155

155.09 cc, liquid-cooled four-valve sohc single with vva, fuel injection, cvt.

Encyclopedia 6 guides
Line diagram of a Smart Key, battery and start circuit for Yamaha NMAX 155 no-start diagnosis.Starting

NMAX 1558 min

NMAX no-start, in order

A NMAX that will not start rarely has a VVA fault. The key system, the battery and two switches account for most no-starts, and they are the quickest to check.

Read the diagnosis
Line diagram of an idle waveform, coolant circuit and CVT for Yamaha NMAX 155 stalling diagnosis.Running

NMAX 1558 min

NMAX stalling, pattern by pattern

A NMAX that dies at a junction is usually losing idle control, coolant performance or fuel pressure. The VVA system is a convenient suspect and an uncommon culprit.

Read the diagnosis
Line diagram of a battery, keyless receiver and charging circuit for Yamaha NMAX 155 drain testing.Electrical

NMAX 1558 min

NMAX battery drain, three causes

A NMAX with a keyless system and idle stop asks more of its battery than a simple commuter. A flat battery is either worn, undercharged or feeding a standby load.

Read the diagnosis
Line diagram of a CVT clutch, belt and variator for Yamaha NMAX 155 vibration diagnosis.Drivetrain

NMAX 1558 min

NMAX judder, source by source

The NMAX spends a lot of its life at low speed, which is exactly where a tired CVT shows up. A judder from a stop is a wear signal, not a reason to replace the belt blindly.

Read the diagnosis
Line diagram of an acceleration curve, CVT and throttle body for Yamaha NMAX 155 power-loss diagnosis.Performance

NMAX 1558 min

NMAX lost pace, in order

A NMAX that feels flat is usually losing drive through the CVT or fighting rolling drag. The VVA system is a feature to understand, not the first part to replace.

Read the diagnosis
Line diagram of a fuel tank, CVT and consumption trace for Yamaha NMAX 155 fuel-use diagnosis.Fuel

NMAX 1558 min

NMAX fuel use, cause by cause

A NMAX is efficient for its size, but city traffic, a passenger and a worn CVT can move the figure a long way. Measure the change before diagnosing it.

Read the diagnosis

YAMAHA Aerox 155

Yamaha Aerox 155

155.09 cc, liquid-cooled four-valve sohc single with vva, fuel injection, cvt.

Encyclopedia 6 guides
Line diagram of a dash, brake switch and battery for Yamaha Aerox 155 no-start diagnosis.Starting

Aerox 1558 min

Aerox no-start, traced from the dash

The Aerox hides its battery and fuses behind sport bodywork. The fastest diagnosis comes from the dash, the brake light and the pump whine, not from removing a side panel.

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Line diagram of a radiator, idle passage and CVT for Yamaha Aerox 155 stalling diagnosis.Running

Aerox 1558 min

Aerox stalling, judged by conditions

An Aerox that dies in a queue, at a closed throttle or on a hot afternoon is giving three separate clues. The conditions matter more than the model's reputation.

Read the diagnosis
Line diagram of a battery, USB charger and current meter for Yamaha Aerox 155 drain testing.Electrical

Aerox 1558 min

Aerox battery drain, audited

A sport scooter collects accessories. Every charger, alarm and tracker is a small load, and together they can empty a healthy battery over a week of short rides.

Read the diagnosis
Line diagram of a CVT clutch, belt and variator for Yamaha Aerox 155 judder diagnosis.Drivetrain

Aerox 1558 min

Aerox judder, judged under load

The Aerox rewards a firm throttle, and that is exactly when a worn CVT complains. Whether the judder appears only under load tells you which part is struggling.

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Line diagram of a CVT and acceleration curve for Yamaha Aerox 155 power-loss diagnosis.Performance

Aerox 1558 min

Aerox lost pace, solo and loaded

A sporty body does not change the physics. An Aerox that feels flat is losing drive, fighting drag or running short of air, and a two-run road test tells you which.

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Line diagram of a radiator, fan and coolant circuit for Yamaha Aerox 155 overheating diagnosis.Cooling

Aerox 1558 min

Aerox overheating, cause by cause

The Aerox cools well when moving and struggles when stopped. That difference is the first clue, and it costs nothing to observe.

Read the diagnosis

YAMAHA Fazzio

Yamaha Fazzio 125

124.86 cc, air-cooled sohc single with hybrid assist, fuel injection, cvt.

Encyclopedia 6 guides
Line diagram of a motor-generator, battery and interlock circuit for Yamaha Fazzio no-start diagnosis.Starting

Fazzio8 min

Fazzio no-start, in order

The Fazzio does not crank like an older scooter. Riders often assume it has failed when it is simply waiting for a signal or a better battery.

Read the diagnosis
Line diagram of an idle passage, cooling fins and CVT for Yamaha Fazzio stalling diagnosis.Running

Fazzio8 min

Fazzio stalling, judged by pattern

The assist system can make a stop feel different from an older scooter. It cannot make a healthy engine cut out, and the pattern of the stall proves it.

Read the diagnosis
Line diagram of a battery, assist motor-generator and charging circuit for Yamaha Fazzio diagnosis.Electrical

Fazzio8 min

Fazzio battery, load and test

The assist system charges and discharges the same battery that starts the scooter. That makes battery condition more visible here than on a simple commuter.

Read the diagnosis
Line diagram of a CVT belt, rollers and clutch bell for Yamaha Fazzio noise diagnosis.Drivetrain

Fazzio8 min

Fazzio CVT noise, sorted by sound

A squeal, a rattle and a slap come from three different parts of the same transmission. Naming the noise correctly is half the repair.

Read the diagnosis
Line diagram of a CVT, cooling fins and acceleration curve for Yamaha Fazzio power-loss diagnosis.Performance

Fazzio8 min

Fazzio lost pace, in order

The assist system adds a useful push at low speed. It cannot compensate for a soft tyre, a dragging brake or a worn belt, and expecting it to is how repairs start in the wrong place.

Read the diagnosis
Line diagram of a fuel tank, CVT and consumption trace for Yamaha Fazzio fuel-use diagnosis.Fuel

Fazzio8 min

Fazzio fuel use, checked in order

A light scooter is sensitive to small changes. A soft tyre or a worn belt can move the figure more than a sensor ever would.

Read the diagnosis

YAMAHA XSR155

Yamaha XSR155

155.09 cc, liquid-cooled four-valve sohc single with vva, fuel injection, six-speed manual.

Encyclopedia 6 guides
Line diagram of a clutch switch, neutral circuit and battery for Yamaha XSR155 no-start diagnosis.Starting

XSR1558 min

XSR155 no-start, in order

A manual bike can refuse to start for reasons a scooter never has: clutch position, neutral, a stand that is down. Those checks cost seconds.

Read the diagnosis
Line diagram of a clutch, idle passage and coolant circuit for Yamaha XSR155 stalling diagnosis.Running

XSR1558 min

XSR155 stalling, cause by cause

A manual bike stalls for reasons a scooter cannot, and the rider is sometimes part of the diagnosis. Separating the two saves a workshop visit.

Read the diagnosis
Line diagram of a battery, regulator and current meter for Yamaha XSR155 drain testing.Electrical

XSR1558 min

XSR155 battery drain, step by step

A naked 155 has a small battery and a small charging margin. A tracker or a charger left live can empty it in a week of short rides.

Read the diagnosis
Line diagram of a chain, sprocket and alignment check for Yamaha XSR155 chain diagnosis.Drivetrain

XSR1558 min

XSR155 chain noise, checked in order

A chain is the cheapest final drive to maintain and one of the most expensive to neglect. The type of noise tells you which part has worn.

Read the diagnosis
Line diagram of a clutch lever, cable and plate stack for Yamaha XSR155 slip diagnosis.Drivetrain

XSR1558 min

XSR155 clutch slip, cause by cause

A slipping clutch is not always worn out. Free play, oil and cable routing can produce the same symptom on a healthy set of plates.

Read the diagnosis
Line diagram of a radiator, fan and coolant circuit for Yamaha XSR155 overheating diagnosis.Cooling

XSR1558 min

XSR155 overheating, step by step

A naked bike has good airflow at speed and none at a red light. Overheating that only happens in a queue is a fan and radiator story.

Read the diagnosis

YAMAHA R15

Yamaha R15

155.09 cc, liquid-cooled four-valve sohc single with vva, fuel injection, six-speed manual.

Encyclopedia 6 guides
Line diagram of a clutch switch, battery and start circuit for Yamaha R15 no-start diagnosis.Starting

R158 min

R15 no-start, in order

A fully faired bike punishes guesswork. Most no-starts are decided by a switch or the battery, long before a fairing bolt needs to come out.

Read the diagnosis
Line diagram of an idle passage, fairing airflow and clutch for Yamaha R15 stalling diagnosis.Running

R158 min

R15 stalling, cause by cause

A high-revving 155 can stall for reasons a commuter never shows: a hot engine at a light, a rushed clutch and a lean idle.

Read the diagnosis
Line diagram of a battery, tracker and current meter for Yamaha R15 drain testing.Electrical

R158 min

R15 battery drain, three causes

A sport bike with a small battery and a big accessory market. A tracker or alarm can be the difference between a strong start and a flat battery.

Read the diagnosis
Line diagram of a chain, sprocket and alignment check for Yamaha R15 chain diagnosis.Drivetrain

R158 min

R15 chain noise, checked in order

The R15 puts more load through its chain than a commuter, and a slightly slack chain becomes audible under acceleration long before it fails.

Read the diagnosis
Line diagram of a clutch lever, cable and plate stack for Yamaha R15 slip diagnosis.Drivetrain

R158 min

R15 clutch slip, cause by cause

A sport bike is ridden harder, so a marginal clutch shows up sooner. Adjustment and oil are still the first suspects, not the last.

Read the diagnosis
Line diagram of a fairing, radiator and fan for Yamaha R15 overheating diagnosis.Cooling

R158 min

R15 overheating, step by step

The R15's fairing helps at speed and hinders at a standstill. Where the temperature rises tells you which side of that trade-off has failed.

Read the diagnosis

03 Brand

Kawasaki

20 guides across 4 models.

KAWASAKI W175

Kawasaki W175

177 cc, air-cooled sohc single, carburettor (verify the individual model), five-speed manual.

Encyclopedia 5 guides
Line diagram of a carburettor float bowl, fuel tap and kick lever for Kawasaki W175 no-start diagnosis.Starting

W1758 min

W175 no-start, in order

A carburettor engine has a start ritual a fuel-injected one does not. Most W175 no-starts are decided by the tap, the choke and a flooded bowl.

Read the diagnosis
Line diagram of a pilot jet, mixture screw and inlet manifold for Kawasaki W175 stalling diagnosis.Running

W1758 min

W175 stalling, cause by cause

A carburettor engine stalls in a different way from an injected one. The idle circuit is physical, and the pilot jet is often the whole story.

Read the diagnosis
Line diagram of a carburettor float bowl, jets and spark plug for Kawasaki W175 diagnosis.Fuel

W1758 min

W175 carb, rich or lean

A carburettor tells you what it is doing through the spark plug, the exhaust and the way the engine picks up. Read those before removing the bowl.

Read the diagnosis
Line diagram of a chain, sprocket and adjuster for Kawasaki W175 chain diagnosis.Drivetrain

W1758 min

W175 chain noise, checked in order

The W175 has a simple chain drive and a modest output. Noise is usually maintenance, not a failed part, and the checks take minutes.

Read the diagnosis
Line diagram of a pilot jet, mixture screw and inlet manifold for Kawasaki W175 idle diagnosis.Running

W1758 min

W175 rough idle, cause by cause

A carburettor idle is a balance of fuel, air and a closed throttle. When it hunts, one of those three has changed.

Read the diagnosis

KAWASAKI Ninja 250

Kawasaki Ninja 250

249 cc, liquid-cooled dohc parallel twin, fuel injection, six-speed manual.

Encyclopedia 5 guides
Line diagram of a twin-cylinder ignition and start circuit for Kawasaki Ninja 250 no-start diagnosis.Starting

Ninja 2508 min

Ninja 250 no-start, in order

A parallel twin can start on one cylinder, which means a no-start and a rough start are different faults. The first checks stay the same.

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Line diagram of twin throttle bodies, coolant circuit and clutch for Kawasaki Ninja 250 stalling diagnosis.Running

Ninja 2508 min

Ninja 250 stalling, cause by cause

A twin idles on both cylinders, so a stall that feels mild can be one cylinder dropping out. The pattern tells you which.

Read the diagnosis
Line diagram of a twin-cylinder cooling circuit and radiator for Kawasaki Ninja 250 overheating diagnosis.Cooling

Ninja 2508 min

Ninja 250 overheating, step by step

Two cylinders share one radiator, so a partly blocked core shows up under load rather than at idle. Where the temperature rises tells you which part has failed.

Read the diagnosis
Line diagram of a chain, sprocket and alignment check for Kawasaki Ninja 250 diagnosis.Drivetrain

Ninja 2508 min

Ninja 250 chain noise, checked in order

A 250 twin puts more torque through the chain than a commuter single. A slightly slack chain becomes audible under acceleration first.

Read the diagnosis
Line diagram of a clutch lever, cable and plate stack for Kawasaki Ninja 250 slip diagnosis.Drivetrain

Ninja 2508 min

Ninja 250 clutch slip, cause by cause

The parallel twin makes its torque lower in the rev range than a 155 single, so a marginal clutch slips in a different place. Adjust before replacing.

Read the diagnosis

KAWASAKI KLX150

Kawasaki KLX150

144 cc, air-cooled sohc single, carburettor, five-speed manual.

Encyclopedia 5 guides
Line diagram of a carburettor float bowl, kick lever and plug cap for Kawasaki KLX150 no-start diagnosis.Starting

KLX1508 min

KLX150 no-start, off-road causes first

A dual-sport bike fails differently. Mud in a connector, water in a float bowl and a plug cap full of grit cause no-starts that never happen to a road bike.

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Line diagram of a pilot jet, air box and cylinder fins for Kawasaki KLX150 stalling diagnosis.Running

KLX1508 min

KLX150 stalling, trail and road

A dirt bike stalls constantly in technical going, and most of those stalls are the rider. The ones that are not have a small set of causes.

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Line diagram of a dirt-bike air box, float bowl and pilot jet for Kawasaki KLX150 diagnosis.Fuel

KLX1508 min

KLX150 carb, dirt-bike causes

A road carburettor mainly suffers from stale fuel. A dirt carburettor suffers from grit, water and a filter that does not seal, and those arrive far faster.

Read the diagnosis
Line diagram of a dual-sport chain, slider and sprocket for Kawasaki KLX150 chain diagnosis.Drivetrain

KLX1508 min

KLX150 chain noise, off-road checks

Long suspension travel changes how chain slack is measured, and mud changes how fast the chain wears. Both matter more here than on a road bike.

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Line diagram of a fork, shock and swingarm pivot for Kawasaki KLX150 suspension noise diagnosis.Chassis

KLX1508 min

KLX150 suspension noise, by location

A dual-sport bike is expected to make some noise. The useful question is which joint is moving when it should not.

Read the diagnosis

KAWASAKI ZX-25R

Kawasaki Ninja ZX-25R

249.8 cc, liquid-cooled dohc inline four, fuel injection, six-speed manual.

Encyclopedia 5 guides
Line diagram of a four-cylinder ignition circuit and battery for Kawasaki ZX-25R no-start diagnosis.Starting

ZX-25R8 min

ZX-25R no-start, in order

Four cylinders, four coils and four injectors give a no-start more places to hide. The order of checks is still the same, and the battery comes first.

Read the diagnosis
Line diagram of four throttle bodies, an exhaust header and a radiator for Kawasaki ZX-25R stalling diagnosis.Running

ZX-25R8 min

ZX-25R stalling, by pattern

A small-capacity four makes its power high up and has very little torque at walking pace. Stalls in traffic are common, and most are not faults.

Read the diagnosis
Line diagram of a radiator, fan and fairing duct for Kawasaki ZX-25R overheating diagnosis.Cooling

ZX-25R8 min

ZX-25R overheating, step by step

A 250cc four makes its power by turning fast, and turning fast makes heat. The cooling system has to work at both ends of the speed range.

Read the diagnosis
Line diagram of a chain, sprocket and alignment check for Kawasaki ZX-25R chain diagnosis.Drivetrain

ZX-25R8 min

ZX-25R chain noise, checked in order

A high-revving four puts its torque through a chain that also has to survive hard acceleration. Noise usually means adjustment or wear, and both are measurable.

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Line diagram of a clutch lever, pressure plate and friction plates for Kawasaki ZX-25R slip diagnosis.Drivetrain

ZX-25R8 min

ZX-25R clutch slip, cause by cause

A high-revving four can mask a slipping clutch with noise. The test is simple: pick a gear, open the throttle and compare revs with road speed.

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04 Brand

Suzuki

20 guides across 4 models.

SUZUKI Satria F150

Suzuki Satria F150

147.3 cc, liquid-cooled dohc four-valve single, fuel injection, six-speed manual.

Encyclopedia 5 guides
Line diagram of a clutch switch, battery and fuel pump for Suzuki Satria F150 no-start diagnosis.Starting

Satria F1508 min

Satria F150 no-start, in order

The Satria's compact body hides the battery and the fuse box, so the cheap checks are also the quick ones. Do them before a single panel clip is moved.

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Line diagram of an idle passage, intake boot and radiator for Suzuki Satria F150 stalling diagnosis.Running

Satria F1508 min

Satria F150 stalling, by pattern

An underbone is ridden in traffic more than most bikes. That makes the conditions of the stall more useful than the stall itself.

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Line diagram of a radiator, fan and coolant bottle for Suzuki Satria F150 overheating diagnosis.Cooling

Satria F1508 min

Satria F150 overheating, in order

An underbone wraps its radiator in close-fitting panels. At walking pace that leaves the fan to do all the work, and a small fault becomes a temperature warning.

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Line diagram of an underbone chain, cover and sprocket for Suzuki Satria F150 chain diagnosis.Drivetrain

Satria F1508 min

Satria F150 chain noise, checked in order

An underbone covers a lot of kilometres in stop-start traffic. The chain sees constant load changes and collects road spray, so maintenance decides its life.

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Line diagram of a clutch lever, cable and plate stack for Suzuki Satria F150 slip diagnosis.Drivetrain

Satria F1508 min

Satria F150 clutch slip, cause by cause

An underbone is often ridden with a pillion and a load. That extra torque finds a marginal clutch before a solo commute would.

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SUZUKI GSX-R150

Suzuki GSX-R150

147.3 cc, liquid-cooled dohc four-valve single, fuel injection, six-speed manual.

Encyclopedia 5 guides
Line diagram of a dash, clutch switch and battery for Suzuki GSX-R150 no-start diagnosis.Starting

GSX-R1508 min

GSX-R150 no-start, in order

A faired sport bike punishes guesswork. Most no-starts are decided by a switch or the battery, and neither needs a panel removed.

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Line diagram of an idle passage, radiator and clutch for Suzuki GSX-R150 stalling diagnosis.Running

GSX-R1508 min

GSX-R150 stalling, by pattern

The fairing changes the cooling behaviour and the riding position changes the clutch behaviour. Both matter when the engine cuts out.

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Line diagram of a battery, regulator and current meter for Suzuki GSX-R150 drain testing.Electrical

GSX-R1508 min

GSX-R150 battery drain, three causes

A small battery, a keyless option on some variants and a busy accessory market. A flat battery is usually a load, a charger or a worn cell.

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Line diagram of a fairing, radiator and fan for Suzuki GSX-R150 overheating diagnosis.Cooling

GSX-R1508 min

GSX-R150 overheating, step by step

A faired 150 cools well at speed and struggles in a queue. Where the gauge rises tells you which part of the system to check.

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Line diagram of a chain, sprocket and alignment check for Suzuki GSX-R150 chain diagnosis.Drivetrain

GSX-R1508 min

GSX-R150 chain noise, checked in order

A sport 150 is ridden harder than a commuter and its chain is partly hidden. Noise usually means adjustment or wear, and both are measurable.

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SUZUKI GSX-S150

Suzuki GSX-S150

147.3 cc, liquid-cooled dohc four-valve single, fuel injection, six-speed manual.

Encyclopedia 5 guides
Line diagram of a naked bike loom, clutch switch and battery for Suzuki GSX-S150 no-start diagnosis.Starting

GSX-S1508 min

GSX-S150 no-start, in order

The naked version of the 147.3cc single is easier to diagnose than its faired sibling. You can see the loom, the battery box and the switch gear without removing a panel.

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Line diagram of an idle passage, radiator and clutch for Suzuki GSX-S150 stalling diagnosis.Running

GSX-S1508 min

GSX-S150 stalling, by pattern

An upright naked 150 is a city bike, and city riding is stop-start. The stall pattern tells you whether the rider, the idle or the heat is responsible.

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Line diagram of an exposed radiator, fan and coolant bottle for Suzuki GSX-S150 overheating diagnosis.Cooling

GSX-S1508 min

GSX-S150 overheating, step by step

No fairing means you can see the radiator, the hoses and the fan. That makes the first checks quick, and it makes a blocked core easier to spot.

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Line diagram of an exposed chain, sprocket and slider for Suzuki GSX-S150 chain diagnosis.Drivetrain

GSX-S1508 min

GSX-S150 chain noise, checked in order

An exposed chain on a naked bike is easy to inspect. That makes noise a maintenance question in most cases, not a mystery.

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Line diagram of a clutch lever, cable and plate stack for Suzuki GSX-S150 slip diagnosis.Drivetrain

GSX-S1508 min

GSX-S150 clutch slip, cause by cause

Most slipping clutches on a city 150 are adjustment or oil problems. The plates are the last suspect, not the first.

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SUZUKI Burgman 125EX

Suzuki Burgman Street 125EX

124 cc, air-cooled sohc single, fuel injection, cvt.

Encyclopedia 5 guides
Line diagram of a brake switch, side stand and battery for Suzuki Burgman 125EX no-start diagnosis.Starting

Burgman 125EX8 min

Burgman 125EX no-start, in order

A scooter starts only when it believes a brake is held and the stand is up. Those two signals, and the battery, decide most no-starts.

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Line diagram of cooling fins, an idle passage and a CVT for Suzuki Burgman 125EX stalling diagnosis.Running

Burgman 125EX8 min

Burgman 125EX stalling, by pattern

A large scooter with a small air-cooled engine works hard at low speed. Heat and CVT drag show up earlier than on a light commuter.

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Line diagram of a CVT clutch, belt and variator for Suzuki Burgman 125EX judder diagnosis.Drivetrain

Burgman 125EX8 min

Burgman 125EX judder, judged under load

A big scooter with a small engine puts load on the CVT from the moment you pull away. Judder that only appears with a passenger is a load symptom.

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Line diagram of a CVT belt, rollers and clutch bell for Suzuki Burgman 125EX noise diagnosis.Drivetrain

Burgman 125EX8 min

Burgman 125EX CVT noise, by sound

A squeal, a rattle and a slap come from three different parts of the same transmission. Naming the noise correctly is half the repair.

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Line diagram of a CVT, cooling fins and brake for Suzuki Burgman 125EX acceleration diagnosis.Performance

Burgman 125EX8 min

Burgman 125EX lost pace, in order

The Burgman carries more body and more weight than a small commuter. A 125cc engine moving that mass will never feel quick, and that is not a fault.

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Workshop Next step

When the test needs a bench

These guides separate what you can check at home from what needs a lift, a meter, a compression gauge or a diagnostic scanner. If the symptom involves fuel, brakes, a hot engine or a noise you cannot place, stop riding and have it inspected.

Motorcycle repair — diagnosis before parts Electrical diagnostics — charging, starting, sensors Fuel injection service — air, fuel, signal Brake service — feel, fluid, friction How a workshop should work