be careful with a bike blown up. you never know what you are getting into. you may need to resleeve it and then other problems arise. i'm rebuilding my 400ex right that already had a 440 kit in it and somehow the cyl. wall got out of round and had to resleeve it, then a bolt going into the head didn't seal tight from being reused so many times and leaked oil so now i have to tear the head off again to get to it, and finally it didn't stay running due to carb/airbox problems that were fine before. a big mess. so be careful of what you may get yourself into.