Specification sheet — Yamaha
Yamaha Jupiter Z1 specifications
A 115 cc underbone with a four-speed gearbox and an automatic centrifugal clutch.
- Displacement
- 113.7 cc
- Peak power
- 7.4 kW / 7,750 rpm
- Peak torque
- 9.8 N·m / 6,750 rpm
- Curb weight
- 101 kg (Spoke wheel) ; 102 kg (Cast wheel)
- Seat height
- 765 mm
- Fuel tank
- 4.1 L
Overview
The published sheet lists a 113.7 cc (calculated from bore x stroke) engine, peak power of 7.4 kW / 7,750 rpm, peak torque of 9.8 N·m / 6,750 rpm. It carries a curb weight of 101 kg (Spoke wheel) ; 102 kg (Cast wheel), a 765 mm seat height and a 4.1 L tank.
On the published figures it works out to 7.3 kW per 100 kg, above the median for the other 5 underbones in this database (6.7 kW per 100 kg).
Market and trim notes
This sheet covers the Yamaha Jupiter Z1 as listed in the Indonesian distributor’s current catalogue. Market-specific equipment can differ from the same nameplate in another country, so the figures are not interchangeable.
Full specification
Every row below is a published figure. Rows the manufacturer does not publish are marked rather than estimated.
Engine and performance
| Engine type | Air cooled 4-stroke, SOHC |
|---|---|
| Displacement | 113.7 cc (calculated from bore x stroke) |
| Bore × stroke | 50.0 x 57.9 mm |
| Compression ratio | 9.3 : 1 |
| Cooling | Air derived |
| Fuel system | Fuel Injection |
| Maximum power | 7.4 kW / 7,750 rpm |
| Maximum torque | 9.8 N·m / 6,750 rpm |
| Starting | Elektrik Starter & Kick Starter |
| Ignition | TCI |
| Lubrication | Basah |
| Oil capacity | Total = 1.00 L ; Berkala = 0.80 L ; Ganti filter oli = 0.85 L |
Transmission and final drive
| Transmission | Constant mesh, 4-kecepatan |
|---|---|
| Clutch | Basah, Multiplat, Centrifugal automatic |
| Final drive | Chain derived |
Chassis, suspension and brakes
| Frame | Backbone |
|---|---|
| Front suspension | Teleskopik |
| Rear suspension | Swing Arm |
| Front brake | Single Disc Brake |
| Rear brake | Drum Brake |
| Front tyre | 70/90-17 M/C (38P) |
| Rear tyre | 80/90-17 M/C (44P) |
Dimensions, weight and capacity
| Length × width × height | 1935 x 680 x 1065 mm |
|---|---|
| Wheelbase | 1240 mm |
| Ground clearance | 150 mm |
| Seat height | 765 mm |
| Curb weight | 101 kg (Spoke wheel) ; 102 kg (Cast wheel) |
| Fuel tank | 4.1 L |
What the numbers mean
The 765 mm seat is a middle-of-the-road height: most riders will get the balls of both feet down.
At 101 kg (Spoke wheel) ; 102 kg (Cast wheel) it is light enough to push around a workshop or park by hand.
The 4.1 L tank is small, in keeping with a short-range commuter; expect regular fuel stops on longer rides. The manufacturer does not publish a consumption figure, so this page does not quote a range.
Tyres are 70/90-17 M/C (38P) front and 80/90-17 M/C (44P) rear. Check that your local shop stocks both before a long trip.
Closest alternatives
| Model | Capacity | Power | Torque | Weight | Seat |
|---|---|---|---|---|---|
| Yamaha Vega Force | 113.7 cc | 6.41 kW / 7,000 rpm | 9.53 N·m / 5,500 rpm | 96 kg | 775 mm |
| Yamaha MX King 150 | 149.8 cc | 11.3 kW / 8,500 rpm | 13.8 N·m / 7,000 rpm | 118 kg | 795 mm |
| Honda Revo X 110 | 109.2 cc | 6.56 kW (8.91 PS) / 7,500 rpm | 8.76 N·m (0.86 kgf·m) / 6,000 rpm | 97.5 kg | — |
Nearest alternatives by category and capacity in this database. These are published figures, not a road test or a recommendation.
Ownership and maintenance notes
- Clean and lubricate the chain at short intervals in rain or dust, and check slack with the bike on its side stand. A loose chain wears sprockets quickly; a tight one loads the output bearing.
- Check tyre pressures cold. On a light bike a few psi matters more than it does on a car, and it changes both steering and tyre life.
- Air-cooled engines rely on clean fins and a clear path for air. Wash the fins gently, and do not let mud or a loose cover block them in traffic.
Source and verification
Figures are taken from Yamaha Motor Indonesia, the Indonesian distributor, on 13 November 2026.
Source page: yamaha-motor.co.id/product/jupiter-z1/.
Cooling, final drive is inferred from the published layout rather than printed as a separate field.
Wording is quoted as published; spacing and unit symbols are normalised. Specification databases go stale: if a figure here differs from the current distributor page, the distributor page wins, and this sheet records what was published on the verification date.
