I think maybe the crank is bent from the crash, but that would not explain the kicking back. It could be harder to turn it over at certain points. For the price of OS parts, I would think hard about fixing it. Maybe use this one or another one for parts. My opinion, it is free. Then again, maybe the rod took the impact and broke, saving the crank from breaking. A rod is not too expensive. (a crank is) Another head spacer wouldn't hurt, at least until it is re-broken in.
Last edited by aspeed; 08-25-2017 at 05:28 AM.