I wouldn't let White Knuckle touch my kids tri-cycle. They sent me a TB that first with their boot wouldn't stay on the head. The high dollar TB then came apart and sent throttle plate screws threw my brand new 778. So I've since rebuilt the throttle body to how it should've been from WK from the start for an almost $700 piece. It did give me a reason to switch from 12.5:1 to 14:1 and to go from 5050 cam to the 5150 along with less restrictive pipes. So thanks to Eric at WHITEKNUCKLE for giving me a reason to go bigger.thanks for the info guys, how is White Knuckle Racing, I was also looking at some of their stuff
+1 after their boot didn't work. I called emailed and got a reply after about a month that they was designing a newer boot style and sending me one. It never came. So I took a few oem boots and started modding them until I got it right. That's how their customer care goes.I agree with spider about white knuckle, stay away from them. Their customer support sucked last time I had to deal with them.