Whipple Belt Question

[99CobraVert04]

Hey Guys,

Question for anyone that runs a whipple. I've got a 2.80 upper and a stock lower. I also have a motoblue 100mm aux idler. Does anyone know what belt size I need.... the reason i get on here and ask this is because i called whipple and they couldn't tell me...... so any help would be much appreciated. Even if no one has a direct answer, but just something that can give me an idea of where to start.

 

[blackvenom77]

Gates K080755

 

[YBS_Mike]

I have 2.9 and a 2.7 RR pulleys and the BilletFlow 100mm idler and I needed a K080760. It works on both pulleys so it's easy to swap. The 755 did not work for me.