CR50 bicycle engine kit, Pedal start. Bore & stroke: 40x 38mm = 48CM3 , petrol oil mixed engine oil, sparking plug, power rotary speed: 1.15-1.6 kw/6000r/min, 1.6-3 horsepower/min, speed: 35 -40km /hour, CR60, CR70, CR80 type can be supplied.The engine can be very easily installated on 26" or 28" bicycle with V frame . 1.First quality cylinder casting. Alloy with chrome liner 2.Dual Connecting Rod Needle Bearings 3.Japanese Engine Bearings 4.Chrome Intake Manifold 5.Chain Tensioner Wheel with ball bearing 6.415 Pitch Engine Drive Chain (#41 Chain Equivalent) 7.Alloy Clutch Lever with hold open catch (new style) 8.Engine Kill Switch mounted on throttle 9.9 Hole 44 Tooth Drive Sprocket 10.Chrome Exhaust Silencer