I put a new crank in my foreman 500 since I swamped it and it took out the rod bearing.Went with a hot rods since it's not $670. I have a knock that's very strong at idle with no load but once you're in motion with constant force on everything, it goes away. I got a video of what I THINK the knock is coming from. The primary clutch seems to have some rotational play on the crank. Any other ideas?