Originally Posted by rustycase
Skarrd, got a question on your piston cutting...
Did you roll your engine over to TDC, scribe the piston through the open port, and trim a notch into it?
How are the results for you?
any difference in low/top end power?
Has it affected balance/vibration any?
pretty much, i couldn't find something to scribe it with this time. so i just eye balled it, then ground away, and kept checking it to see how much more i needed to take off.
it pretty much increased power overall, mostly bottom end and top end, mid was left about the same.
didn't notice any change in vibration at all.
i know i need to check the piston clearence on the top at tdc to see if i need to mill the top of the clyinder body at all for the new head i bought.
bike so far is topping out at 35mph-ish. needs some more tuning and adjusting before it'll get back to the 40mph range.