2003Yamaha RZ 50
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The 2003 Yamaha RZ 50 is a sporty 50cc road bike for teenage riders. Its liquid-cooled 49cc single makes 7.2 hp and 5.9 Nm through a six-speed gearbox and chain. A 745 mm seat, 80 kg dry weight and 10-litre tank make it light and fun.
- Capacity
- 49.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 80.0 kg
- Seat height
- 745 mm
- Power
- 7.2 HP (5.3 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Designed as a lightweight sport-styled moped for short urban hops and learning basic riding skills rather than any serious performance riding.
- Built for
- A sporty-looking but low-powered two-stroke single that rewards revving and light, nimble handling over outright speed.
- Not ideal for
- This is not for experienced riders seeking real performance, highway travel, long-distance touring, or carrying a passenger comfortably.
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
- 7.2 HP (5.3 kW)
- Torque
- 5.9 Nm (0.6 kgf-m)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.0900 HP/kg (dry)
- Bore x stroke
- 40.0 x 39.7 mm
- Compression
- 7.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Ignition
- C.D.I. Formula
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multiple plate coil springs
Dimensions & weight
- Wheelbase
- 1215 mm
- Overall length
- 1805 mm
- Overall width
- 615 mm
- Overall height
- 970 mm
- Seat height
- 745 mm
- Dry weight
- 80.0 kg
- Fuel capacity
- 10.00 litres
- Ground clearance
- 135 mm
Chassis & suspension
- Front suspension
- Hydraulic telescopic fork
- Rear suspension
- Swingarm with twin shocks
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Expanding brake
- Front tyre
- 70/100-17 40P
- Rear tyre
- 80/90-17 44P
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 | 2002 | 2003 | 2004 | 2005 | 2006 |
|---|---|---|---|---|---|
| Capacity | 49 cc | 49 cc | 49 cc | 49 cc | 49 cc |
| Dry weight | 80 kg | 80 kg | 80 kg | 80 kg | 80 kg |
| Seat height | 745 mm | 745 mm | 745 mm | 745 mm | 745 mm |
| Fuel capacity | 10 L | 10 L | 10 L | 10 L | 10 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 Yamaha RZ 50?
The 2003 Yamaha RZ 50 has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the Yamaha RZ 50 have?
The 2003 Yamaha RZ 50 has a Power of 7.2 HP (5.3 kW).
How many gears does the Yamaha RZ 50 have?
The 2003 Yamaha RZ 50 has a Gearbox of 6-speed.
What is the torque of the Yamaha RZ 50?
The 2003 Yamaha RZ 50 has a Torque of 5.9 Nm (0.6 kgf-m or 4.4 ft.lbs).
How much does the Yamaha RZ 50 weigh?
The 2003 Yamaha RZ 50 has a Dry weight of 80.0 kg (176.4 pounds).
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