Reply to thread

Message: [QUOTE="Bill Hibbs, post: 728199, member: 16336"] I'm doing a top end on my 99 ktm 300exc. I've heard often one of the crank seals leaks and causes an air leak. How do you change these or This crank seal? Which side is it on? I was thinking about doing this while I had it apart anyway. Another question. What would make me want to buy a new piston instead of using the old one? The old one is a little discolored and had a slight bit of carbon on the top but over all it looks fine. The cylinder's smooth and no scratches. I just want to make sure I'm not missing anything. Overall the engine and powervalves are very clean. Just a little carbon but not too much really. I doubt I even needed to do a top end. It's been a couple years and thought I'd tear it apart to be safe. Thanks! [/QUOTE]