Friend has a 2000 SP500 EBS. Just wondering what white spring is everyone using {epi,ritter,hpd ect...} ???

I put the polaris white one in mine, well worth the $20. Mid range acceleration is improved quite a bit.

All of the white color code springs are from Polaris.
Talk to a 400 Scrambler owner that's put a clutch kit in his quad, he'll have the white spring that came out of his, and probably sell it cheap.

There is/was a post on this forum discussing the problems brought on by using the white spring. Most problems are associated with burning up drive belts. I have a white spring in mine but will reinstall my original blue/green as soon as I have time. It does improve take-off and mid-range power because it engages at a higher rpm and maintains a relatively lower gear throughout the rev band. The burning up of the belts comes from the extra belt slippage (more heat generated) at take-off.