I think I successfully replaced my top end (new rings and piston) tonight. I have to say the most difficult part of the whole job other than the amount of time was aligning the rings with the piston alignment pin and holding the rings in place while sliding the cylinder over it. I assume they stayed aligned because the cylinder slid on super easy and I rode the bike for 15 min and every thing seems great. Does this mean I'am in the clear or does it take an hour worth of riding for the rings to fully expand and then if they are not perfectly aligned trouble strikes? Also I used Wiseco piston kit, is this as good as the OEM piston and rings? The other pain was installing the circlips. Has anyone ever had a problem with the circlips falling out and doing major damage to the top end? Thanks for answering all my top end replacement quesions it all proved to very valuable advice.