Polaris P90X Primary Clutch Spring

Springs are for replacing your AA clutch kit springs or for the tuner who knows what spring they want. Green/Silver 75-175 Spring: This is the lowest engagement spring we offer but also has a lower spring rate up top than our standard clutch kit springs, so you will lose 100-200 RPM and weights will need to be 1-2 magnets lighter to achieve the same peak RPM.Gray/Red 80-200 Spring:  Excellent spring that is sometimes used in our clutch kits.  Nice engagement around 1700-2000 RPM while still keeping the final spring rate (full shift rate) up close to our standard gray/yellow spring.Gray/Yellow 85-240 Spring:  This is our standard clutch spring found in our P90X HD clutch kits with an engagement of 1800-2100 in most cases.Gray/White 115-240 Spring:  Race Spring.  This spring has the same full shift rate found in our gray/yellow standard primary spring, but has an engagement of 2500-2700 RPM.  Keep in mind this spring will be harder on your already weak clutch because of the harsh enga