Clutching

[thefullmonte]

If you are having trouble with the link, just jump over to the general Polaris forum. Scroll down as it is on the first page. Titled as "question for those who clutched their D-8's" by AKSOWRIDER.
I've been trying very hard to think of a way to answer your question on why the 62 or 64 is preferred over the 56.
I have tried it, but didn't work well with the weights I was using. I tend to clutch more like winter brew and Ron. Not really right or wrong. With clutching there are many variables that come into play. Riding style and personal preference being some biggies.
Here is how it was explained to me last year. Hopefully, I get this right as I certainly am not the clutching guru. As winter brew stated, the steeper angle is providing less grip on the belt. You may think of it as slipping, or just shifting through that area of the helix very quickly. This is allowing the clutch to shift into a higher gear very rapidly allowing the motor to build rpm and start to shift out. You minimize trenching upon take off and by the time you are in the primary angle of the helix the motor is pulling hard by being well into it's power curve.
Hopefully that helps. Anyone else able to help on this?

 

[Going Up]

Fullmotne - Thanks, that does make sense.

 

[Ron]

from what i have been told.. 58 goto a 64 will make it pull harder out of the hole..my 08 d8 came with 62g a blue/pink spring and a 58 helix. i put 64g in and it pulled harder but not rev`s out a 8000 flat. carls has a kit with a custom cut helix spring and wieghts for about $300. they didnt say angles or weight but its a kit for the not so much tunner. guys that run 68g whats your top rpms?

The initial angle is the starting angle of the helix and it is progressively lower until it reaches the 2nd angle covering a distance noted in the 3rd number. A 62-42-.46 progresses from 62 degrees until it reaches 42 degrees in a distance of .46". As Karnedge stated the initial angle is for better hookup/upshift...you are into the 42 degree portion of the helix at 10-15 MPH. The steeper initial angle works very well in the West since it reduces track spin & lets the clutch shift up quickly. This actually stops trenching and reduces belt heat in many cases. The 42 degree works well with the stock bl/purple driven spring on our bigger tracks. The key is getting the primary in sync with the secondary. The heavier weights you can run then the less finicky the clutching as snow conditions and altitude change. Unfortunately, the stock clutching just doesn't work very well in the West.