So this is the first top end i have done and today when i got the top end apart i found that one of the power valves are broken, and the piston hit the valve and did some damage to the cylinder. I am just wondering what the cheapest and easiest way to repair it would be. Would it be cheaper to sleeve or bore and replate the cylinder? Also the cheapest power valve i could find was $100 on ebay. I am planning on selling the bike so the cheaper the better. Sorry for all the dumb questions.