Went and tried out the larger 90/100/21 Bridgestone 403 front tire on my 08 at the races today. I also tried the 120/80/19 - 404 rear. It took some getting used to and the bike definitely doesn't turn as sharp. The rear works excellent but i will be switching back to the 80/100/21. I like the feel of the bigger tire in the deep loam but it seems hard to get it over on the edge through the turns. Maybe it needs some getting used to, i don't know. I guess thats why they come from the factory with a 80/100/21.