Hello! I am build two 224 predators for mini bikes. I have build several 212 and have had many years of experience with the Briggs (in karting). So the 224 has been a little bit of a pain with all of the clearance grinding needed. The biggest issue was the cam with the billet rod. I thought i got it all good, checked everything while rotating by hand. Started it up and there was a for sure ticking going on. Pulled it back apart and the compression release arm was contacting the crank weight. I ground out the spot on the arm, and touched up the crank just to remove the mark. Seems much better now. Has anyone ran into this? the crank is very close to the whole compression release assembly. thanks!