Product Name: Center Mounted Four Stroke Bicycle Engine Kit Model NO.: WP48F Application: Road Bike, Mountain Bike, Ordinary Bicycle Certification: ISO9001 Condition: New Product Description 4-stroke center mount conversion kit for adult bicycles. It is more stable, more reliable and quieter than the 2 stroke motors. This engine is the copy one of Huasheng 142F and 144F.Chain Transition System and Rubber Belt Transition System are available.It is up to you what you prefer.Engine Specification: Type 4-stroke , single cylinder with Air cooledModel142F144FBore×Stroke41.8×35.8mm43.5×35.8mmDisplacement49 cc53.2Max. output (kw/6800/min)1.21.5Ignition systemNon-contact transistorized ignition(TCI)Start modeRecoil hand-operatedAir cleanerSemi -DryPackage included:(1)Chaintransmission assembly/4G transition assembly.(2) Adjustable mounting plate to fit most cruiser and v frame bikes.(3) 44T sprocket.(4) 415 chain and ball bearing idler.(5) Throttle and cable.(6) 1.5 litre tear drop tank.(7)6month warranty on any faulty parts.