Ok thought i had a tranny problem. 4th gear and once in a while 3rd the bike was jumping hard like the chain was skipping teeth, but wasnt. So I had the case split and really couldnt find nothing wrong in the tranny beside the fork that locks in the gears. It had wear on it like it was rubbing off something. We couldnt tell if it was bent to the eye. Anyway we went ahead and ordered a new fork. We also ordered a timing chain while we are in there. Does any 1 else have a idea of what it could be before we put her back together?! Also we went ahead and and ordered a high compression (13.5) Pistion and rings. Was that a good or bad thing? Its going to get honed and a clean up port job too. The valves looked good. Any thing else I should do to the bottom end while I have it apart? Also noticed my sub-frame was bent so I have to start looking for one. IS there anything else on the 03-05 450f that are common problems?