I have an 06 450f that is set up really nice, suspension built for me, dampner, FMF Ti Pipe, its Street Legal & Plated. But my lighting is weak and poor with no real way to a high power electrical system and that keeps me from having nice lighting for night time off road rides. A high power stator, wide ratio trans and e-start will be nice to have. I am trying to figure out without having to buy the engine cases if modern AL framed WR motor will fit in the 06 AL framed YZ. Anyone tried ? Yamaha mechanics, are the bolt patterns the same ? I am not worried about the labor expense as I will be doing the work myself and I assume I can part out the left overs of both motors to more than cove my costs. Thoughts ?