i have a 05 450r and i have a 13 to 1 je piston in it with a hrc cam. i check my valves regular and change my oils every couple trips. i broght my bike out to a mx track and rode it and locked the stock crank up. replaced everything and put a hot rod crank in it with new rings. had less then a year on it and was riding the track last night and locked it up agin. have not pilled the motor apart yet but it sounded the same and did the same thing as the first time.. any reasons why this could be doing this !!! its starting to hurt my wallet !!! its not a cheap fix!!! please any help out there would help! thaNks

What bearings did you use? Was this a stroker crank?