Naked Motorcycles
2002Yamaha YB-1 Four
24 fields on record
The 2002 Yamaha YB-1 Four is a lightweight entry-level classic motorcycle ideal for beginner riders and urban commuters. Its modest 49cc single-cylinder engine delivers reliable performance with simplicity and fuel efficiency. Known for its nimble handling and approachable character, it remains a practical choice for learners seeking an affordable, easy-to-manage machine.
- Capacity
- 49.0 ccm
- Engine
- Single single, four-stroke
- Gearbox
- 4-speed
- Dry weight
- 83.0 kg
- Seat height
- 745 mm
- Power
- 4.1 HP
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for short urban hops, errands, and light commuting rather than any kind of performance riding.
- Built for
- A charming, retro-styled classic commuter that prioritizes simplicity, economy, and easy manageability over excitement or speed.
- Not ideal for
- This is not for riders seeking highway touring capability, passenger comfort, or any kind of spirited or off-road performance.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 49.0 ccm
- Power
- 4.1 HP
- Torque
- 4.0 Nm (0.4 kgf-m)
- Engine type
- Single single, four-stroke
- Power/weight ratio
- 0.0494 HP/kg
- Bore x stroke
- 36.0 x 48.6 mm
- Compression
- 9.5:1
- Cooling system
- Air
- Fuel system
- Carburettor
- Valves per cylinder
- 2
Transmission
- Gearbox
- 4-speed
- Transmission type
- Manual
- Final drive
- Chain
Dimensions & weight
- Wheelbase
- 1190 mm
- Overall length
- 1785 mm
- Overall width
- 655 mm
- Overall height
- 960 mm
- Seat height
- 745 mm
- Dry weight
- 83.0 kg
- Fuel capacity
- 7.20 litres
- Ground clearance
- 130 mm
Brakes & wheels
- Front brakes
- Expanding brake
- Rear brakes
- Expanding brake
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Yamaha YB-1 Four?
The 2002 Yamaha YB-1 Four has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the Yamaha YB-1 Four have?
The 2002 Yamaha YB-1 Four has a Power of 4.1 HP.
How many gears does the Yamaha YB-1 Four have?
The 2002 Yamaha YB-1 Four has a Gearbox of 4-speed.
What is the torque of the Yamaha YB-1 Four?
The 2002 Yamaha YB-1 Four has a Torque of 4.0 Nm (0.4 kgf-m or 3.0 ft.lbs).
How much does the Yamaha YB-1 Four weigh?
The 2002 Yamaha YB-1 Four has a Dry weight of 83.0 kg (183.0 pounds).
Shop this bike
Affiliate linksWe may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.
Please log in or register if you'd like to leave a comment.