best viper clutch kit

Describe your rpm's from start to finish. Sounds like you may have an overrev significant enough to lose a lot of power.
 
Are you using an old belt? That will make sled overrrev. Try the red secondary spring at 80 instead of the green.Also change the inner rivet from a 3.6 gram to a 4.5.
 
The belt was new,about 100 miles on it.I'll try the 4.5 rivet.The green spring is what comes stock in the secondary? I will buy the red and give that a shot.
 
Red spring is stock in the Viper secondary. Don,t spend any more $$$. I can make that work.
 
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