50cc motorcycle engine Model: JL1P39FMB Order: 016 Type: 1-Cylinder, 4-Stroke, air-cooled, horizontal, OHC Displacement: 49.5 Compression Patio: 9.5: 1 Bore X Stroke: Mm 39 X41.4 Roted Power&Rotating Speed: Kw/(r/min) ≥ 2(7000± 500) Mar Torque&Rotating Speed: N. M/(r/min) 3.2(5000± 500) Idling Speed: R/min 1500± 150 Min Fuel Consumption: G/kw. H ≤ 367 Ignition: CDI Starter: Electric/Kick Lubrication: Pressure Splash Transsmission: 4 Speed Clutch: Coil Clutch