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Message: [QUOTE="Micahdawg, post: 901714, member: 21668"] First off....I sent the head to Eric Gorr last week. Just put a note with it to get it back in 92-93 pump gas range. Also, I have not mic'd anything yet, but I have a brand new wiseco piston ready to go in. The cylinder is bare and is going to the local shop today to get mic'd and see if it needs another hone. The cross hatch looks good still, but I just wonder if a fresh hone would help the rings seat. With the cylinder bare and in my hands, I reinstalled the piston and the power valve to see the clearance. I moved the piston up and down carefully in the bore with the powervalve all the way in. It never snagged even once. BUT.....I wonder if a hot cylinder (expanded metal) would cause a clearance issue? The reeds are good and unchipped/cracked. I also do not believe that there was any air leak. Seems like air leaks just cause throttle to increase period (500, 600, 700, 800, 900, 1000, 1100+ rpm, etc...) My idle was surging up and down in rythm. I checked the stator and it looks to be in the original position (I.e. no advancing). At least no glaring evidece like old screw marks where it was relocated. I also thoroughly cleaned the carb. It was missing two vent lines and one was plugged. Plus gas was dumping out the overflow frequently. A good clean and inspection of the float needle, float hieght, jets, etc... got it to quit dumping. It looked pretty clean in there though. So i don't think the pitting on the piston is sand or debris. The pitting on the piston is not something I would really worry about if the bike had a fair amount of hours. But after about 5 hours on a new top end it looked like the wear was a little advanced. Thanks for the tips and stuff. Just looking to cover all my bases up front so this doesn't take a 6 pack of pistons to figure out :) Micah [/QUOTE]

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