Sportbikes

2003Rieju RS-1 Evolution Racing

8 fields on record

The 2003 Rieju RS-1 Evolution Racing is a lightweight 50cc sport bike designed for entry-level riders and racing enthusiasts. Known for its agile handling and competitive spirit, this single-cylinder machine delivers 8 horsepower with an impressive power-to-weight ratio. Its compact dimensions and manageable seat height make it ideal for younger or smaller riders pursuing track racing ambitions.

Capacity: 50.0 ccm
Engine: Single
Gearbox: Not on record
Know it? Add it →
Dry weight: 87.0 kg
Seat height: 800 mm
Power: 8.0 HP (5.9 kW)

⇄ Compare with another bike ＋ Add to garage All model years

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail15%

Cornering60%

City riding70%

Daily riding25%

Touring8%

Two-up5%

Track55%

Best for: Built as a small-displacement sport replica for short blasts, mini-track days, and learning race-style riding habits rather than outright speed.
Built for: It has the aggressive sportbike styling and riding position of a full-size racer shrunk down into a playful, buzzy 50cc two-stroke package.
Not ideal for: This is not the bike for highway travel, carrying a passenger, or any rider expecting real-world touring range and power.

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 us

Your height

Inseam (optional)

Units

At 800mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2003 Rieju RS-1 Evolution Racing, with a cramped knee angle of around 70 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 751-820 mm — Middle Ground →

Find bikes that fit your height →