Its a combo of spring power and inertia... doesnt supprise me one bit... add in a hamfisted operator yanking it like a large saw and twists will happen....I never expect that ez start would crank the motor that hard.
Nice, congrats!!!
This is the first startup tank after warming up.... for having about .050 squish to minimize (got it down to about .010") free port at tdc, it runs pretty snotty..... would love to have a way to get the squish AND the freeport down.....
could be a real beast then.....timing is pretty close to stock, as i just kinda freehanded it, intake was lowered a hair, exhaust was raised and widened a hair, raised mostly to just even out the lopsided port from the factory LOL, lower transfers opened up and smoothed into the uppers, since there was a nasty bulge in both ports that restricted the flow of the casting, and uppers were untouched since i dont have a right angle head for the flex shaft nor do i have the cahones to take a grinder to the uppers yet.... my woods port saws run pretty dang good "in my opinion" 
compression is king!Thanks to @StihlEchoingHusky this saw lives again... joint effort on the massaging of the cylinder thanks to modern tech being able to send pics and vids back and forth...
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Sheeeeeeeit! You're just getting started.This is the first startup tank after warming up.... for having about .050 squish to minimize (got it down to about .010") free port at tdc, it runs pretty snotty..... would love to have a way to get the squish AND the freeport down.....
