2003 Mtn Viper set up.
Here is what I'm running. I ride at 8,500 to 11,000 with this set up and get about 8-9 MPG. I'm a hair lean at 8,500 and a hair rich at 10,500. Carb heaters off.
PTO 145, CENTER 147.5, MAG 147.5, Pilots 45, Needles 2.0, Air screws 1 7/8.
Torsion spring silver, Torsion cam 43 degrees, 90 degree twist on secondary.
13.3 steel outer rivet, 13.3 Alum inner, 8DN 10 weights, Green-White-Green spring
I engage at 4,050 rpm and max out at 9,100 out of the hole and settles to 9,000
21 x 40 gearing. I'm jetted for 20 to 0 degrees air temp. If its colder out I my sled runs a little lean, warmer is richer of course. On deep powder hill climbs I can hold about 45 mph track speed. I know the MPG sounds low, butttt most my riding is off trail in untracked powder.
Keep in mind that with SLP pipes you want to run at 9,000 rpm ish and he is going to be 30 less hp or so. Hope this helps.
