I have a bad crack in my wr 450 crank case and am about to order a new one and transfer everything over to the new one. Any idea if bearings are transferable, or should you never reuse them,should every one be replaced? Would you rather press them in or sweat them? Anyone done this before? Any help would be great! I've seen great videos but I would just like a few more tips if i could get em. Thanks!