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Awesome increase in low end
and midrange power.
The perfect choice for woods
riders or just someone looking for the ultimate in lightweight,
quick-revving thump!
We stroke your stock crank
assembly, and modify your new OEM piston.
INCLUDES: Work done on your
crank and piston.
REQUIRES:
Send in your crank for modification. Download our
Stroker Booklet for
details.
Send in a new Yamaha OEM piston for modification.
RECOMMENDATIONS: For engines
with over 200 hours of use, we recommend replacing the rod assembly. |
