Hey guys, first post, but I've been a long time lurker. I have a 2000 426. I've been riding it will no issues for about a year now. The other day I pulled it out of my garage for an oil change and filter clean. After cleaning the filter I wanted to warm it up before an oil change. After kicking it over for 20 min, which was odd because it usually starts very easy, it still didn't start. I pulled the plug and checked for spark. I tried starting it again and on the first kick, with the decompression lever pulled in, it back fired. After that it seemed to lose compression and I couldn't find top dead center. Now when I kick it over it sounds like compression is coming through the carb. The spark plug was a tan color and very dry. A guy told me I probably broke a valve and to pull the head....so I did, and everything looked good. The timing chain, cams, valves and top of the piston all looked good to me. I'm really not sure where to go from here and was hoping to get some advice and direction as to where to look next. The last time I rode it was a 30 mile single track ride on a very hot day. I don't think I overheated it but I guess its possible. I shut the bike down that day and it didnt seem to run funny or make any odd noises. Thanks for any help.