2011 Polaris Ranger RZR ATV Service Manual, Page 233Get this manual
CLUTCHING DRIVE CLUTCH SERVICE
Spring Specifications
The drive clutch spring has two primary functions: 1To control clutch engagement RPMThe springs, which have higher rate when the clutch is in neutral, will increase clutch engagement RPMTo control the rate at which the drive belt moves upward in the drive clutch sheavesThis is referred to as drive clutch upshiftRedWhite 7043349 RedBlue 7043372
There are other components which control upshift, but the spring is one of the primary components in insuring optimum performanceIt is very important that the spring is of the correct design and is in good condition
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Never shim drive clutch spring to increase its compression rateThis may result in complete stacking of the coils and subsequent clutch cover failure