Hey all I've got an '01 WR426. It's been piped(fmf power core). I had a 98 WR with YZ timing. Is there benefit to changing the timing on the '01? Also what about grinding down the throttle stop or replacing it with the YZ stop. I've read a few articles on both. I ride in Alberta,Canada(bike purchased in Canada if that makes a difference) between 5,000ft to 9,000ft elev. Any thoughts would be greatly appreciated.....It's still snowing here so riding is a way off. I've used the S12's on hard/shale terrain alot.