So after looking through the FAQ and doing searches I have yet to find the answer I am looking for... so I am sorry if I missed it. I have a 99 YZ 400 that I am looking at putting a the wide ratio WR trans into it. I already have the cases split and need to replace a couple of gears so I thought this would be a great time to do it. What I want to know what gears to replace, and what year WR do I need to get the gears (and shafts if needed) from? I hope there are still a few 400 experts around here that know a thing or two about these old beasts.