Cranking the engine with the foot crank, I am getting a reading of about 50 psi compression on each cylinder on the Banshee. Is this within specs???? Thanks

 

Thats terriable compression! i checked my shees compression and it was at 117 and its a 1990. I think its had a rebuild but its been a while. stock compression is around 125 completley stock. So u need to do a top end re-build!

 

If your compression test shows 50 psi your engine is indeed dead but did you kick it till the gage stopped rising?

 

Yeah, thanks guys. I went ahead and pulled the cylinders and it was not a pretty site. The pistons looked nearly new but the left cylindeer had a deep gouge from top to bottom and about a 1/4" wide and the right one had a similar one. The left piston had absolutely no carbon and was bright and shiney as if it has never fired. The right one had carbon but not a large build up. The piston skirts even look almost new. I suspect that someone replaced the pistons and rings and did not touch the cylinders when it went sour before. I think they are gouged so bad the cylinders need to be replaced and someone just did not want to go to the expense and do it right. The rings were really worn bad on one side. On the left piston, the top ring was worn down to about half of it's original width in a spot about 1 1/2" around and on the front side of the piston. Very egg shaped. All had this wear pattern but at different locations on the ring. The right one was also very egg shape but worn in a different position also. I plan on taking it to a shop that builds racing bikes tomorrow if the are open and see what they say. I don't think the cylinders can be bored. The pistons are stamped 2.00 MM. Am not sure how much the cylinders can be machined. They should be able to tell me.
Like they say "There is nothing wrong with it that money can't fix!"