MPN2

Hi there,

I've recently rebuilt a 2005 700 king quad engine that blew a piston due to over heating, or so its what it looks like!! Now the engine is back in and pured like a kitten for the first few start up tests. I called my buddy over who is the owner of the bike so he can give me a hand at getting the rest of the stuff back on and as he was testing it out in the shop and it started this knocking noise out of nowhere in the top end or i think anyways. Ive tried it all taking the head off to inspect, re-timed and re-timed, check the cam chain and cams and cannot figure out what it is. I have a video for whoever can give me idea what the heck it is. Thanks any help would be appreciated. Also it seems to stop knocking when i give it throttle???

Any resolution to this?