Primary clutch springs

[70superbee]

Where can I find the specs of primary springs for my attak? Want to do some more clutch tuning this year.
Thanks Richie R

 

[BlueByYou2000]

Your spring is a Y-S-Y (Yellow-Silver-Yellow)

Click here for yamahas spring chart:
http://www.totallyamaha.com/snowmobiles ... prings.jpg