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Stage 1 for stock engine
Note: This bore kit only fits the 2006-2017 CRF150F
The 02 thru 07 Output Shafts were very weak and would often snap so best to update while you have the engine apart
It mounts directly on the shift shaft and removes the sloppy linkage system for smoother shifts
The dampening rod has also increased in length so the travel can match at +40mm over 1
TB V2 108cc Stroker Big Bore Kit – Honda 50cc & 70cc 1988+ Handlebar Kits Stage 1 for stock engineTB V2 108cc Stroker Big Bore Kit Honda 50cc & 70cc 1988+ TBparts 108cc Race Head V2 Kit , 52mm Bore Kit, & 51mm Stroker Crank. Converts the following stock models to 108cc: 1988 and newer Honda Z50, CT70, XR50, XR70, CRF50, & CRF70 Starting with the V2 cylinder heads larger stainless steel (21 4N) valves, better porting, roller cam, and forged aluminum roller rocker arms that allow the engine to rev quicker, farther, and make much more power than the
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