i have 8lb lower pulley setup with 3.25 harley upper pulley with a 3.7 alt. pulley. Also have an upper idler but not sure what size it is. Just wondering what belt will get me close to what i need.
Did you check the Belt Guide on my website?
Quite possible it's not there. Try to find a setup close to yours. Might help you find a belt size to try.