User Rating: /5 · No user ratings yet✓ Your rating was saved
MotoLibrary Score
36/100Commuter
Power/Weight
0.1 hp/kg
Top Speed
80 km/h
Engine
125 ccm
Technical Overview
1998 Rieju RR 125 Fun Bike Technical Analysis & Specification Breakdown
Positioned in Rieju's cross - motocross motorcycle lineup, the 1998 Rieju RR 125 Fun Bike utilizes a 125 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 9.5 HP (6.9 kW) at 7,200 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 76 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the RR 125 Fun Bike measures 95 kg (209 lbs) dry, translating to a power-to-weight ratio of 0.1 HP/kg (10 kg per horsepower). The 5.5-liter (1.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 80 km/h (50 mph).
Specific Output
76 HP/L
Power-to-Weight
0.1 HP/kg (10 kg/HP)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power9.5 HP (6.9 kW)) @ 7200 RPM
Compression9.0:1
Bore x Stroke56.0 x 50.6 mm (2.2 x 2.0 inches)
Fuel SystemCarburettor. Dell´Ortho PHBL 26
Fuel ControlMembrane
Ignitionelectric
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet Plate
Performance
Top Speed80.0 km/h (49.7 mph)
Chassis
Frame TypeTubeular
Front SuspensionInverted forks 32mm Showa®
Rear SuspensionMonoshock Gas
Wheels & Brakes
Front Tyre80/69-j56
Rear Tyre110/62-61j
Front BrakesSingle disc. AJP
Front Brake Ø220 mm (8.7 inches)
Rear BrakesSingle disc. AJP 2 piston
Rear Brake Ø185 mm (7.3 inches)
Dimensions & Weight
Dry Weight95.0 kg (209.4 pounds)
Power/Weight0.1000 HP/kg
Fuel Capacity5.50 litres (1.45 US gallons)
Other
StarterKick
Color OptionsBlack
Notes
Cooling has no fan! Gasgas trials engine. Very rear due to engine over heating. Quick off the mark!
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
