Funny thing is, I stopped by my local machine shop this afternoon and ran my dilema past the guy there. He was scratching his head too.
This darn thing has symptoms of a number of problems, but I can't nail it down to one problem.
I don't remember off the top of my head what part # the pistons are, but I remember that the 58cc edelbrock heads that came on it originally were only like 10:1. These new heads are around 64cc and I run 93 religioulsy anyway. When this started the first thing I did was check the spark plugs. No signs of detonation whatsoever on plugs, pistons, or heads. This is when I noticed the slack in the pushrods.
Any experience I've had with busted valve springs has showed up as a dead cylinder throughout the entire rpm range, not just above a certain point.
This darn thing just seems to get better all the time.
