I have a 01 426F and have been having a problem where the decompression valve will stick open every now and then. Which then causes the bike to not have any compression and it won't start off course. I have been able to get around the situation by "flicking" the decompression lever or by pushing the bike in first gear until it comes unstuck. After it comes unstuck the bike starts and runs fine and will restart with no problems. Has anyone else had this problem? Any suggestions?