i took my cylinder to midway yamaha. They told me that it needed resleeved a 250.00 repair. I put an add on craigslist and got a stock cylinder with piston and rings for 75.00. I can't wait to get my blaster running. I was told by yamaha from him just seiing cylinder and piston that my crank is bad, even though it will not move up and down when in the top most position. I think he just wanted to make a 1000.00 off of me for a rebuild.