Engine: Single-cylinder four-stroke with light alloy cylinder. Liquid cooling with three way pressurised circuit. Single overhead cam with chain timing drive; four valves. Anti-vibration balancer shaft. -Fuel: Unleaded fuel. -Bore x Stroke: 100 x 84 mm -Total displacement: 660 cc -Compression ratio: 10:1 -Maximum power at the crank: 48 HP (35 kW) at 6,000 rpm. -Maximum torque at the crank: 6.01 kgm ( 59 Nm) at 5,000 rpm. -Fuel system: Integrated electronic engine management system. Electronic fuel injection. 44 mm throttle body. -Ignition: Electronic. -Starting: Electric starter. -Generator: 290 W -Lubrification: Dry sump with oil pump. -Gear box: 5 speed. Transmission ratios: 1st 12/30 2nd 16/26 3rd 20/23 4th 22/20 5th 26/20 -Clutch: Multi-plate in oil bath. Cable operated. -Primary drive: Spur gears. Transmission ratio: 36/75. -Final drive: Chain. Transmission ratio: 15/44. -Frame: Steel, open cradle, single spar frame. -Front suspension: 45 mm fork. Wheel travel 140 mm. -Rear suspension: High strength steel swingarm. Aprilia Progressive System (APS) rising rate linkages. Sachs hydraulic monoshock with adjustable rebound and preload. Wheel travel 130 mm. -Brakes: Front: stainless steel floating disc, Æ 320 mm, four piston caliper. Rear: stainless steel disc, Æ 240 mm, two piston caliper. -Wheels: Alloy wheels with twinned spokes. Front: 3.50 x 17". Rear: 4.50 x 17". -Tyres: Front: 110/70-17. Rear: 160/60-17. -Dimensions: Overall length: 2,173 mm Overall width: 810 mm Ground clearance: 250 mm Seat height: 780 mm Wheelbase: 1,479 mm -Fuel tank capacity: 16 litres (3.5 litre reserve).