If they are 10 paddle ultra buffs i would not run them with a stock swingarm, you wont be able to keep the nose on the ground. We run 10 paddles on our 425 methanol honda its 2 feet longer then stock and it will carry the wheels all the way through 5th gear. Id run an 8 for a stock length swingarm. 9's for an extended swingarm.

 

Very informative posts thanks guys.....late,zubbeyboy