  THIS WILL EXACTLY REPLACE THE 49.5MM STOCK CRANKS IN LIFAN , ZONGSHEN OR OTHER CLONE 90CC AND 110CC ENGINES. COMES FULLY ASSEMBLED WITH ALL BEARINGS AND TIMING GEAR, READY TO INSTALL. TO GET THE CORRECT DECK HEIGHT,, THIS CRANK MUST USE A 69MM TALL CYLINDER, WITH 84 LINK CAM CHAIN AND MATCHING LONGER CYLINDER STUDS THIS USES A 13MM PISTON PIN THE RIGHT AND LEFT CRANKSHAFT ENDS ARE EXACTLY LIKE THE STOCK HONDA CRF50 OR CRF70, IN OTHER WORDS THE STOCK HONDA CDI FLYWHEEL AND STATOR AS WELL AS THE STOCK CLUTCH WILL BOLT RIGHT ON. (OR ANY AFTERMARKET PARTS FOR THE XR/CRF 50/70) (IF BUILDING A STOCK 50 OR 70 ENGINE) YOU WILL NEED LOTS OF OTHER PARTS TO MAKE IT WORK... IF YOUR BORE IS 47MM, THIS WILL MAKE YOU A TRUE 90CC ENGINE UP FROM 85CC IF YOUR BORE IS 52.4 MM, THIS WILL MAKE YOU A TRUE 111CC ENGINE UP FROM 107CC IF YOUR BORE IS 54MM, THIS WILL MAKE YOU A 117CC ENGINE |