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51MM STROKER CRANK:
FITS: All 4 Speed CT70H/SL70/XL70, 80-81 3 Speed CT70, and 81-85 ATC70 (turns engines with 88 kits to 108cc). Must use 12v new style pistons and 6v High Volume oil pump with this crank (for clearance).*
- 51mm Crankshaft with NTN bearings
***MUST RUN TBW0225 OIL PUMP WITH THIS CRANK****
*Stock oil pump shaft is to large in diameter.
TBW0225 oil pump drive shaft is a smaller diameter than stock and therefore, the stroker crank clears it.
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6v Motors
Turns 88cc into 108cc
*Must also use modern 12v type piston with this crank for proper clearance
Measures 64mm from timing gear center to the end of the crank.
NOTES:
We highly recommend a professional technician install this kit. If you plan on installing the kit yourself, you will need to have a Clymer or Honda shop manual.
Instructions do not come with the kits but the installation of the crankshaft is just like installing a stock Honda crankshaft and both manuals cover this.
