Naked Motorcycles
1990Kawasaki GPZ 305 Belt Drive
19 fields on record
The 1990 Kawasaki GPZ 305 Belt Drive is a lightweight, nimble middleweight twin ideal for new riders and commuters seeking accessible performance. Its air-cooled 306cc engine delivers 34 horsepower with smooth power delivery, while the innovative belt final drive offers low maintenance. Known for reliability and easy handling, this allrounder excels in urban environments and beginner-friendly touring.
- Capacity
- 306.0 ccm
- Engine
- Parallel Twin, four-stroke
- Gearbox
- 6-speed
- Wet weight
- 164.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 34.0 HP (25.0 kW) @ 10000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Designed as an easygoing all-round commuter and learner bike rather than a performance or adventure machine.
- Built for
- A modest, low-maintenance twin with a low-stress delivery, softened further by the low-noise, low-maintenance belt final drive.
- Not ideal for
- This is not the bike for riders seeking high-speed thrills, serious touring range, or any off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 306.0 ccm
- Power
- 34.0 HP (25.0 kW) @ 10000 RPM
- Engine type
- Parallel Twin, four-stroke
- Power/weight ratio
- 0.2073 HP/kg (wet)
- Bore x stroke
- 61.0 x 52.4 mm
- Compression
- 9.7:1
- Cooling system
- Air
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Belt
Performance
- Top speed
- 152.0 km/h (94.4 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Dual disc
- Rear brakes
- Expanding brake
- Front tyre
- 90/90-18
- Rear tyre
- 110/80-18
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1984 | 1986 | 1987 | 1989 | 1990 |
|---|---|---|---|---|---|
| Capacity | 306 cc | 306 cc | 306 cc | 306 cc | 306 cc |
| Fuel capacity | 16.5 L | 16.5 L | 16.5 L | 16.5 L | 16.5 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Kawasaki GPZ 305 Belt Drive?
The 1990 Kawasaki GPZ 305 Belt Drive has a Capacity of 306.0 ccm (18.67 cubic inches).
What engine power does the Kawasaki GPZ 305 Belt Drive have?
The 1990 Kawasaki GPZ 305 Belt Drive has a Power of 34.0 HP (25.0 kW) @ 10000 RPM.
How many gears does the Kawasaki GPZ 305 Belt Drive have?
The 1990 Kawasaki GPZ 305 Belt Drive has a Gearbox of 6-speed.
How much does the Kawasaki GPZ 305 Belt Drive weigh?
The 1990 Kawasaki GPZ 305 Belt Drive has a Wet weight of 164.0 kg (361.6 pounds).
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