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Message: [QUOTE="sidecase, post: 564386, member: 25853"] I had my cylinder at a local machine shop. He screwed up the bore. His set my cylinder up wrong in his boring machine and now my bore is a little off center. He calls me at work and say the .020 wiseco piston is too small, I better call and order a .040 over piston. 15 minutes later, He calls again and say " did you order that .040 piston yet?". I told him no and he said " good, your going to need a .050 over piston" . I'm thinking what the hell is going on here? So I rushed over there and told Him that obviously he doesn't now what the hell he is doing. He says my machine is only a year old and tried to tell me that it was crooked from the factory. I told him he was full of **** and I thought he was trying to cover up the fact that he bored it of center by mistake. The bike was on the stock bore. Long story short, I got my cylinder and my money back and have since found a repitable shop. The shop told me that they can correct the other guys mistake but the final bore will be .060 over stock. The last bore for this cylinder is .080. My question is does wiseco compensate the thickness of the dome of the piston to offset the a compression increase from the larger bore diameter? Or will I have to modify the head to keep the compression stock? The compression reliefs that were ground in from the factory above the exhaust ports are now ground completely out by going .060 over the stock bore. Should I expect any changes in power delivery. Any help or comments would be greatly appreciated. Thanks, Larry [/QUOTE]

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