Complete 100cc VLR Box Stock Engine Kit, Motor Mount Sold Separately Engine kit comes with Senior Header, Junior Header Sold Separately VLR Engine Specs - 100cc 2-Stroke BORE 48.20 mm STROKE 54.00 mm Conrod C-to-C Distance 102.00 mm Intake System Reed Valve Carburetor Butterfly Valve 24mm Intake Silencer Arrow LA22 Cylinder Liner/Sleeve Cast Iron Made Dry-Liner/Sleeve Transfer Ports 3 Ports EXHAUST PORTS 1 Elliptical Port + 2 Boosters COOLING SYSTEM Air Cooled LUBRICATING SYSTEM Oil-Fuel Mixture Lubricated IGNITION SYSTEM Selettra START SYSTEM Integrated Starter Motor Transmission W/ Clutch CLUTCH SYSTEM Centrifugal Dry-Clutch System COMPRESSION RATIO 10.5 : 1 MAXIMUM POWER 20Hp at 9800 rpm MAXIMUM TORQUE 1,4 Kgm at 9600 rpm MAXIMUM SPEED 16000 rpm