TOP-END Rebuild

you dont need to replace the cylinder unless it has bad damage. Take it apart( the easy part) and bring it into your favorite local shop and have them look at it if you are unsure about its condition.

Reboring should not be needed unless it is damaged. If it's a newer model, the cylinder should be fine. Get yourself a manual if you don't already have one and read it, then make sure you have all the parts needed along with the gaskets ready. The hardest thing to do is to take something apart for the first time and not be able to put it back together right away. There are some great threads about cylinder wall prep in here if you can search for them. You can get a piston rebuild set for around 80 bucks and a gasket set for around 25. Take your time, especially when it comes to placing the rings on the piston and make sure you take apart your powervalve and clean it. Next, search for the break in procedures here, there's another good thread about that, it's just as important as the rebuild. It's really easy to do once you do it, and don't forget the new coolant too. Good luck

Cylinders on newer bikes are plated and very durable. If you bore it it must be re-plated or sleeved. If doing a topend you should be fine replacing the piston and rings