What primary spring to rev less?

[Swedenboy]

My Viper Mtn does'nt run well in snow as I said before in thread...

Now I'm in to check the clutch. When I drove over a lake "pedal to the metal", dry snow on top with pretty much water on the ice it revs 9000, speed 115 km/h (70 mi/h. Have made a mark on primary clutch and the belt is over 20 mm from outer edge with max throttle. Think the backshift is good.

So, a friend said that I should put a spring with same pressure in start (3900rpm) but softer in the end so the belt climbs up on primary and then it will rev less. Spring in primary is green-white or silver-green and secondary is green(not 100% sure but almost).

Is this standard and what spring should I go to in primary?

Belt is rather good 34mm wide and 1 mm over secondary.

 

[Turk]

Add bigger rivets to the primary weights. this is the proper way to do this. You need to add about 2 grams to each hole of the weights

 

[Swedenboy]

Thanks for fast reply...

 

[snomoguy]

Turk is right. Took him awhile to convience me and after a good a&* chew'en, I'm thankful. You have to clutch some mass into the mt. viper to overcome the sudden force of the power valves. I am geared down to 21/42, but am running weights heavier than book and still holding right on rpm.