Okay, My 03 YZ 450 is having clutch issues.... so I just replaced the Friction plates, Springs, and robbed some new Steel plates from a WR426 clutch set, and put them into my Hinson clutch Boss, Basket, and pressure plate. The clutch deosnt seem to be slipping but it will engage itself and stall even with the lever pulled all the way in. I should point out i did wear a bit of a groove into my clutch boss cuz i ran a WR 426 clutch in there by accident for about 3 rides. The groove is barely there, and my machinist and the head tech at the dealership i work at said it will be fine, just run it. What do you think is going on here?? The parts manager thinks its a warped steel plate- but they are brand new!! help please!!!