07 switchback 600 H.O CFI primary spring?

[polarisboy]

2007 polaris switchback 600 H.O CFI 144" 1"1/2 track

-I still have factory spring in primary clutch and i wanna change it with a different color spring whats the best choice for this sled? Thanks..

 

[Eldeno]

I have used an EPI Yellow spring with good results in both the 600 carb and 600 CFI engines. Engagement will be between 4,000 and 4,500 RPM and just watch your max RPM to ensure it is around 8300.