Product Name: Spare Parts Attach The Proper Engine to Rear Wheel Certification: CE, ISO9001?2000 Cold Style: Air-Cooled Stroke: Four Stroke Cylinder NO.: 1 Cylinder Start: Pull Start Type: Cooling System Trademark: WoodPecker Origin: Original Product Description 42cc 4 Stroke Rear-Wheel Drive Side MountGas Motorized Bicycle Engine Kit-Convert almost any bicycle into a motor bike in no time at all.- Simple installation-Get up to 200 mpg and reach speeds of 30+ MPH- The kit is rugged enough to be used for everyday, reliable, economic transportation.-All kits come with complete mounting hardware.- Quick release engaging system-The kit uses an engine that has an automatic centrifugal clutch- Fuel Tank Volume: 2LEngine TypeAir-cooled, 4-Stroke, OHV, single cylinderBore x Stroke41.8 x 36 mm (1.65 x 1.42 in)Displacement42 cm3 (2.99 cu in)Compression Ratio8.0 : 1Net Horse Power Output1.6kW (2.1HP) at 7,000 rpmNet Torque2.7 Nm (2.0 lbs ft) at 4,500 rpmPTO Shaft RotationCounterclockwise (from PTO shaft side)Ignition SystemTransistorized magneto ignitionStarting SystemRecoil StarterCarburetorFloat TypeLubrication SystemForced SplashGovernor SystemCentrifugal MechanicalAir CleanerSemi-dry TypeOil Capacity0.25l (0.26 US qt, 0.22 Imp qt)Fuel Tank Capacity (liter)0.77l (0.81 US qt)Dimensions (L x W x H)225mm(8.9 in) x 274mm (10.8 in) x 353mm (13.9 in)Dry Weight5.5 kg (12.1 lbs)