14 TOOTH 420 CHAIN TYPE SPROCKET INSTALLED NOTE!! THIS ENGINE HAS A ROTORY SHIFT TRANNY/PATTERN (SOME_LIKE_IT??) THESE WILL GO FROM 4TH GEAR BACK TO NEUTRAL WITH JUST ONE MORE PUSH,, THEN TO 1ST GEAR WITH ONE MORE PUSH, SO JUST BE AWARE OF THIS SMALL DETAIL, AS IT CAN BE DANGEROUS IF YOUR GOING MORE THAN 5 MPH LIFAN_70CC BOTTOM_MOUNTED ELECTRIC_START 4_SPEED AUTO_CLUTCH ENGINE (70CC_4A_R_E) 70CC_4A_R_ERegular price: $289.99Sale price: $229.99 CLICK ON PICTURES TO SEE BIGGERTHIS IS WHAT COMES WITH THE ENGINE FROM THE FACTORY CLICK ON PICTURES TO SEE BIGGER CLICK ON PICTURES TO SEE BIGGER THE COMPLETE TOP END OF THIS ENGINE WILL GO RIGHT ON YOUR TIRED XR50 XR70 CRF50 CRF70 (1991_TO_1994_CT70) (1982_TO_83_PASSPORT) (Z50R_1982_TO_1999)AND YOU GET A NEW CARB, CLUTCH, FOUR SPEED TRANNY SET, CLUTCH COVER, KICK AND SHIFT PEDALS, ETC ETC