which primary clutch spring is best for a stock v?

 

I like my EPI pink. I has a little stall with 3 shims under it and the shiftout is fairly high at 161 allowing it to pull strong all the way to the top end. I tried the Polaris yellow and the stall was way to much for me. I felt it would give me problems with trail riding. I have no other clutch mods and it seems to work good for me.