What primary spring do I need

[sandmanmike1]

What primary spring do I need and my sled pics

I have a 94 Yamaha Vmax 600 ST 136" with a 96 Vmax 600XT secondary, carbuerators and Single pipe. I put in a yellow-pink-yellow spring in the primary which is too heavy and i am over-revving some. the 96 xt calls for a blue-pink-blue which is lighter. Because my sled is a long track with a 2000 venture skid installed would i use the stock 96 xt spring? Single seat is back on it.
http://www.totallyamaha.com/snowmobiles/AAATuning Chart/Specs.htm

 

[daman]

how much are you over-revving by???

 

[sandmanmike1]

Was revving to around 8,400 or so

 

[daman]

what ya got for tip weight(rivets)? did you try adding more to the tip??

 

[sandmanmike1]

Stock weights i put in too heavy primary spring.

 

[daman]

so put in a lower rate/total force spring should help..

 

[sandmanmike1]

Would the stock 96 XT spring be a good choice?

 

[daman]

yes

the b-p-b should help thats a 97 vs. the y-p-y 111.

 

[sandmanmike1]

Looking for a blue-pink-blue primary clutch spring part number 90501-525J8-00

 

[daman]

Mike your PM box is full...

what happen to your original b-p-b??

 

[sandmanmike1]

Bumping post to show sled for sale and 2 up seat for sale. Sled now has Viper skis on it. I am parting out entire sled email me with needs and offers

 

[daman]

what happen Mike,why the part out?? you put allot of time in the ol girl last year??