I have an 03 wr450 and there is not all that many hours on the bike, but the starter clutch seems to have gone. My question is how hard is it to replace? I have looked in the manual and there is a special yamaha puller required, is there a way to get around this with using a generic cheap puller? any suggestions is greatly appreciated, the dealer is wanting about $150 for labour to do this. Thanks for the help.