Does anyone know who the two holes in the helix for the secondary spring and the three holes in the secondary clutch outer sheeve affect clutch tuning? What would be the best setup for strong acceleration? I am willing to sacrafice top end for acceleration.
Also, Would the HPD Violet Spring work best for accelartion or does someone have a better suggestion on the best spring to use in the secondary sheeve for accelation? I currently run an orange primary, a violet secondary, s55 weights and a 44-36 helix.

 

There is no given formula that works for everybody, it's all trial and error with a lot of wrenching involved.

Depending on your current motor mods you might want to start by going to a lighter flyweight. Don't forget that sprocket changes can effect acceleration/top-end as well. If your willing to sacrafice top-end try a 38T rear but, everything is relevant to your motors capability.

 

Using numbers to explain, the holes in the sheeve would be numbered left to right 1,2,3 with 1 being the stiffest pretension and 3 being the softest. On the helix, the holes are numbered from the right to the left, with 1 being the stiffest and 2 being the softest. Stiffer pretension means quicker backshifting (downshifting) while softer pretension means better acceleration (upshifting). The violet spring is a good choice, similar to the AAEN blue I think.

 

On an Arctic Cat snowmobile clutch, the holes for the spring on the secondary sheeve determine how high the engine will rev when "shifted out".

Increasing spring tension increases the rpm and decreasing spring tension decreases engine rpm.

Moving the spring on a Cat results in an rpm change of 200 rpm increments.

The principle is probably the same on a Polaris clutch.

The spring on the primary clutch determines the belt engagement rpm, and the weights determine how quickly the belt will move up through the primary sheeves.

 

On the helix 2 is the stiffest and 1 is the weakest.
helix shieve
2 and 1 is the stiffest
2 and 2 is next
1 and 1
2 and 3
1 and 2
1 and 3 is the softest

 

You should really call E.P.I. and pick thier brain, if a person starts changing things in the clutch department without knowing what the right combonations are you'll actually lose instead of gain. As with snowmobiles "the clutching is everything!" It may cost a little more,but they have done all the testing for you.