Built around Rieju's sport motorcycle platform, the 2005 Rieju RS1 Evolution features a 50 cc (3.1 cu in) liquid-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 9 HP (6.6 kW), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 180 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
The 9-liter (2.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
180 HP/L
Engine
Displacement50.0 ccm (3.05 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power9.0 HP (6.6 kW))
Compression12.0:1
Bore x Stroke39.0 x 40.3 mm (1.5 x 1.6 inches)
Valves/Cylinder0
Fuel SystemCarburettor. Dell´ortho
Fuel ControlReed valve / power valve
IgnitionCDI
LubricationSeparate lubrication with automatic oil pump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMultiplate wet clutch in oil bath
DrivelineChain final drive
Chain Size420
Chassis
Frame TypeDouble cradle steel tube.
Wheels & Brakes
Front Tyre90/90-16
Rear Tyre120/80-16
Front BrakesSingle disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø200 mm (7.9 inches)
Dimensions & Weight
Overall Length1855 mm (73.0 inches)
Overall Width630 mm (24.8 inches)
Fuel Capacity9.00 litres (2.38 US gallons)
Oil Capacity1.30 litres 2T reservoir / 0.80 L gearbox
Service & Fluids
Engine Oil2-stroke synthetic motorcycle oil (API TC / JASO FC/FD)
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
