Furthermore it comes with a high-quality 4-disc clutch! With 7.4 kW by 7500 rpm the engine reaches more than the triple performance of a standard CRF50 engine. Best of all, it comes with 22MM racing carburetor. Single cylinder, 4-stroke, 2 valves, OHC racing head, air cooled, 125cc Bore x Stroke: 54mm x 54mm, this is a'square' engine for best balance between power and torque. Gear Ratios: 1st 2.833:1, 2nd 1.706:1, 3rd 1.238:1, 4th 0.958:1 Final Drive: 14 tooth #420 front sprocket included we have other sprockets on sale too!!Lubrication: 1.1 liters, 5W/40 4-stroke motorcycle oil, pressure and splash Fuel: Unleaded. Intake manifold, intake gaskets, Shifter, Kick Starter, Wiring Harness, CDI, Spark Plug and Ignition Coil. This package has almost everything, excepts a bike to bolt on. This Motor should fit the following models: Note: This is not a guarantee, if you are unsure, please check with your local dealer. HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / / CS 90 / SL 90 / ZB 50 /. We have not had a single problem with the engine. CDI, WIRING HARNESS, COIL, KICK START, SHIFTER+22MM CARB and MANIFOLD included!! LIFAN 125CC Motor Engine XR50 CRF50 XR 50 CT 70 MANUAL H EN18-SET" is in sale since Friday, August 21, 2009. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Other Engines & Engine Parts". The seller is "hunterh01" and is located in Ontario, California. This item can be shipped worldwide.