Quote:
Originally Posted by zman007007
any type of lawnmower engine you buy is only going to turn about 3600 rpms stock no matter what size it says the hp is. about half of what a gy6 turns. stock.
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Correct, in stock form. If you replace the rod, flywheel and valve springs, you can easily turn it up to 8k RPM without failure, 5600 if you don't change the springs. I thought about doing the same thing with my Yerf, but decided I want a gear box instead of a CVT.