I have read the old posts, but got all confused with all the years talked about. Anyway, split my 2000 YZ426F cases today and the second set of gears on both shafts are missing half of there teeth. All other gears look to be alright. If I need all new gear sets anyway, I was wondering if I could just put the WR gears in with spending about the same amount of money. Is this possible? Could I use the same shift forks and other parts? Can single gears be changed or does the whole shaft have to be swapped? I ride more trail than mx, will I be happier with the wr trans, or will I lose that wheel lifting torque of my YZ?