The Roadster 521 is a 125cc motorcycle made by the Italian motorcycle firm, Cagiva in the 1990s. One of the fastest accelerating 125cc motorcycles of its time, the Roadster 521 is known to have a top speed of 80 mph restricted and an estimated 100 mph+ un-restricted. Achieving approximately 70 miles per gallon, it is relatively economical for a 2-stroke motorcycle. Specification Make Model Cagiva Roadster 521 Number produced 329 between 1993 and 1999 Year 1993 Engine Air cooled, Single cylinder, two stroke Capacity 125 Bore x Stroke 56 x 50.6 mm Compression Ratio 11.7:1 Induction Ignition / Starting Electronic CDI Max Power 15.5 hp @ 7500 rpm Max Torque 18 Nm @ 9000 rpm Transmission / Drive 6 Speed / chain Front Suspension Hydraulic telescopic fork Rear Suspension Single-shock Soft-Damp Front Brakes Single 260mm disc Rear Brakes 160mm drum Front Tyre 3,25-19 Rear Tyre 140/90-15 Dry-Weight 125 kg Fuel Capacity 11 Litres Consumption average 22.0 km/lit Braking 60 - 0 / 100 - 0 13.3 m / 39.9 m Standing ¼ Mile 18.6 sec / 104.0 km/h Roadster Two-stroke motorcycles Single-cylinder motorcycles Standard motorcycles