Engine & Performance Engine: 471?cc liquid-cooled DOHC parallel-twin, 4 valves per cylinder Bore / Stroke: 67.0?mm × 66.8?mm; Compression Ratio: 10.7:1 Fuel System: PGM-FI with 34?mm throttle bodies Transmission: 6-speed, O-ring chain (15T/41T) Estimated Output: ~47 hp and 32?lb-ft torque; top speed around 105?mph Fuel Efficiency: Around 60–72 mpg depending on source  Chassis & Suspension Frame: Diamond-shaped steel-tube frame for optimal rigidity and lightness Front: 41?mm Showa SFF-BP inverted fork with 4.7? travel Rear: Pro-Link single shock with 4.7? travel and adjustable preload  Braking & Tires Brakes: Dual 296?mm front discs with four-piston calipers and two-channel ABS; single 240?mm rear disc with ABS Tires: 120/70-17 front and 160/60-17 rear on lightweight alloy wheels