I am buying a 03 WR450 that is street legal and setup for supermoto from a buddy. The problem is, it needs a complete engine rebuild. He tore it down and said the crank bearings were bad so I figured I will buy a hot rod crank kit along with new piston kit. Not a big prob and local shop said they will rebuild motor for $200 labor so I can do this pretty cheap. My main question is, what do I need to go and replace? I heard these motors had horrible woodruff key problems. Would a new crank fix this or is there some upgraded parts I need to throw in? He has upgraded the starter motor he said. I just dont want to dump money into a new rebuild and have a part fail that I should of replaced when it was apart. I have done a few searches on the issue but I want to make sure I have everything figured out before I start dumping money into this bike. As a side note. The bike is titled, street legal, comes with super moto wheels and tires as well as the offroad wheels and tires which will most likely never be put back on. He is asking $1500 for the bike as is. Does this seem like a good deal? I realize that is still a lot for a bike that does not run but considering the supermoto parts and the hassle of making it street legal is already done, I think its a decent price. Oh course I can prob get him to come down on price.