its just a chian reaction...from one engine to the next what caulsed this one was when bearing#3 went out it gave the piston that extra space it needed to tap the valve enough to keep it running but give me loads of blowby and fowlingout of plugs....but i have loads of heads jst lating about LOL....I hope to have it back up by this weekend so maby i can have it out on the road finaly....not like its to much to look at right now but hey what the hell....LOL
art