2002 153" Viper gearing and clutching

[2strokeguy]

Hello Everyone,

I need some help with gearing and clutching on my Viper. It has a 153" track with 2" paddles, bender triple pipes, bender clutch kit, 8 tooth drivers, and the single layer head gasket mod. I think the gearing in the chaincase is stock as far as clutching the primary has stock weights with a yellow and orange spring, and the secondary has a white and blue spring with the bender billet helix. It feels like it is geared too tall, is shifting up too fast, and shifting down too slow. I do most of my riding at high elavation (8000ft+). Do you guys have any clutching and gearing recommendations for this setup?

Thanks!

 

[Maim]

have ypu tried winding the wrap on the secondary tighter?

 

[2strokeguy]

I have tried that. It helped but still is not right.

 

[Yamitriple]

Maybe try a shallower helix

 

[Mysledblows]

What’s the gearing?? I’ve never played with a viper but have used plenty of modded up srx’s and mountain maxes in MT and WY. Rpm’s where they should be?

 

[2strokeguy]

Not sure what the gearing is I am planning on pulling the chaincase cover and checking soon. I think the RPMs are pretty low compared to a 136" Mountain Max I rode once. It has been at least last season since I have ridden the sled so I dont have exact numbers as far as RPMs. Do you have a setup for a 153" Mountain Max? I would assume they are very similar so I can at least get close to the correct setup.

 

[Maim]

8600 rpm is what you aim for unless piped. with pipes, you aim for the top rpm for the pipes. some are 8600 rpm, others want 9100 rpm.