TNT135 has 4 valves; 2 spark plugs and a 5 speed ! Engine Type: Single-cylinder; 4-stroke; Oil-cooled; 4-valve; SOHC; Double-spark Displacement: 134.7 cc Bore and Stroke: 54 mm x 58.8 mm Cooling: Liquid Compression Ratio: 9.8 : 1 Fuel System: EFI w/ 28 mm Throttle Body Transmission: 5-speed Front Suspension: 41 mm; Inverted Rear Suspension: Spring Pre-load Adjustable Shock Front Brakes: Disc; Ã˜ 220 mm; w/ 2 Piston Caliper Rear Brakes: Disc; Ã˜ 190 mm; w/ Single Piston Caliper Front Tire: 120/70-ZR12 Rear Tire: 130/70-ZR12 Wheelbase: 47.8 in. Seat Height: 30.7 in. Fuel Capacity: 1.9 gal. Dry Weight: 255.7 lb.