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52mm STROKER (SHORT_ROD) CRANKSHAFT W/PISTON, BEARINGS AND TIMING SPROCKET<p>FITS CDI MODELS Z50R XR50 CRF50 XR70 CRF70<p>WITH BIG DOME HEADS,, 52MM OR 54MM BORE (63MM_HIGH) CYLINDERS

THIS MUST BE !!

USED WITH THE INCLUDED PISTON KIT

USED WITH A CDI FLYWHEEL/STATOR

USED WITH THE NEW TYPE THIN OIL PUMP DRIVE SHAFT AS SEEN BELOW

USED WITH A STANDARD 63MM TALL CYLINDER IN 52MM OR 54MM BORE (54MM REQUIRES BIG BORE CASES)

AND !!

USED WITH A BIG DOME RACE OR OLD TYPE 70CC 22MM AND 25MM VALVE SIZE HEAD


86Y/(1-42"OR"54/GBO)$199.95PICK_PISTON_SIZE: 

270%_OVER_STOCK HIGH_FLOW OIL_PUMP FITS_PRE_1982 Z50_CT70<P>SL70_XL70 FITS_ALL_ATC70 ALL_TRX70 1/21M (319J)
270%_OVER_STOCK HIGH_FLOW OIL_PUMP FITS_PRE_1982 Z50_CT70

SL70_XL70 FITS_ALL_ATC70 ALL_TRX70 1/21M (319J)

319J$39.99