Check air leaks, fuel pressure and injector spray before replacing sensors or the ECU. A throttle-body clean and a correct idle reset solve many poor-running complaints.
What this job covers
Check air leaks, fuel pressure and injector spray before replacing sensors or the ECU. A throttle-body clean and a correct idle reset solve many poor-running complaints.
Signs you need it
The bike hesitates, surges or stalls at low speed. Idle is unstable or too high. Fuel consumption has increased. The exhaust smells of fuel or the plug is black. A fault code points to a mixture or sensor problem.
The process
Baseline scan: Fault codes, live data and fuel trims are recorded. The battery and charging system are checked first.
Air and fuel checks: Intake leaks, air filter, fuel pressure and injector delivery are tested.
Injector service: Injectors are cleaned and their spray pattern checked. A poor pattern is replaced, not ignored.
Sensor verification: Sensors are tested against specification. A sensor is replaced only when the test supports it.
Reset and adapt: Throttle, idle and mixture adaptations are reset where required, then the bike is run and ridden.
Road verification: The fault is checked under load and at steady speed, not just at idle.
What is included
Fault-code and live-data report Injector cleaning and spray check Throttle-body and idle-passage cleaning Fuel-pressure test Sensor testing before replacement A road test and a note on fuel quality
What affects the scope
Fuel quality and tank condition Whether the injector or pump is worn Aftermarket exhaust, intake or piggyback modules Sensor availability and calibration requirements
How to prepare
Tell us when the fault appears and whether the fuel tank has been drained or stored. Bring any recent tuning or exhaust changes. Use a known fuel source; contaminated fuel causes repeat faults.
Checklist
- Injector cleaning and spray-pattern testing
- Throttle body and idle-air passage cleaning
- Fuel pressure and pump delivery
- Air leaks and intake boots
- Sensor testing: TPS, MAP, O2, temperature
- Mapping, reset and road verification
Questions
Does fuel injection need cleaning?
Yes, eventually. Injector nozzles and throttle passages accumulate deposits, especially with short trips and variable fuel quality. A spray-pattern check tells you whether cleaning is justified.
Can I fit an aftermarket exhaust without a tune?
Sometimes, but the engine may run lean or lose midrange. A proper remap or a verified fuel module is part of the exhaust, not an optional extra.
Why does the bike stall only when cold?
Cold-start enrichment, idle-air passages, sensor temperature readings and battery voltage all matter. It needs a cold-start test, not a guess made on a warm engine.