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Message: [QUOTE="flyincat, post: 609701, member: 43178"] Well I took the cylinder off to try adding base gaskets. I monkeyed around some more trying to figure out where the noise was coming from and here is what I found. It looks like the clunking is from the gear on the end of the crank. I must have just been transmitting through the entire engine. When I hold tension on the rod and rock the flywheel back and forth, I hear the same noise I heard when I ran it. The same effect happens when I rock the clutch basket. From what I know, gears have to have some backlash in them. Do those gears normally have to be replaced at some point because of this problem? Or is there an underlying problem that causes this, like a bad bottom end? [/QUOTE]