Engine GP460RS Engine Type 45.7cc air cooled single-cylinder two-stroke Bore and Stroke 40mm x 33mm Carburation Walbro 19mm Maximum Speed Fastest production scooter in the world Drive Train Chain Drive / centrifugal clutch Sprocket ratio 6:76 Chain #25 heavy duty, non o-ring Frame Patented heavy Duty 4130 Chromoly aircraft quality steel frame Fork Extreme Duty 4130 Chromoly aircraft quality steel fork - Double Sided Handlebar 6061-T6 hardened aluminum ? Aircraft Grade, fitted with slide tube clam Engine Mount Patent pending, combination solid aluminum third bearing/clutch housing with easy chain adjusting and chain guard Fuel Tank Capacity 1.5 liter - patented Wheels Pneumatic TT Tires - 10" ultra light Magnesium rims Brakes Front and Rear Stainless Steel Mad Dog Disc Braking System Folding Effortless folding feature for easy storage and carrying Weight 35 lbs. Additional features Heavy duty rear axle, Unbreakable fender, Idle/Free wheel capable, Motorcycle style racing handlebars, Pro Clamp, Race Engine, Pro Brake Lever capacity 400lbs