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51MM_STROKER LONG_ROD CRANK_ASSY

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THIS CRANK MUST BE USED WITH CASES FROM XR50_CRF50 XR70_CRF70 Z50R_1984_&_UP 91_TO_94_CT70 OR OUR BIG BORE CASES

AND!!:

1. A 69MM TALL CYLINDER, OR 5 TO 6MM'S OF SPACER PLATES (SEE_BELOW)

2. A CYLINDER BORE OF 47MM OR BIGGER.

3. AN 84 LINK CAM CHAIN (SEE_BELOW)

4. LONGER AND BIGGER STUDS (ALSO_SEE_BELOW)

THIS 51MM STROKER CRANK IS EXACTLY THE SAME AS A STOCK CRF50/70 CRANK, EXCEPT THE PIN IS 6MM HIGHER AT TOP DEAD CENTER, MORE STROKE AND THE ROD IS MUCH STRONGER.

COMES WITH 2EA NEW 6304 KOYO JAPAN MADE MAIN BEARINGS, AND 14 TOOTH CRANKSHAFT END TIMING CHAIN GEAR.

THE ROD IN THIS CRANK WILL REPLACE HONDA # 13201-GF6-300

51mmCRANK