Aftermarket Assassins P90X Primary Clutch Spring Polaris

  Springs fit the P90X HD clutch found on the Pro XP/Turbo R, Pro R, & 2021 RZR Turbo/Turbo S Springs are for replacing your AA clutch kit springs or for the tuner who knows what spring they want Rough engagement rates below with our AA clutch weights.  Engagement will vary depending on clutch weight design and overall arm weight Unless advanced at clutch tuning we do not suggest running any springs without our clutch kit Measured at 2.45" & 1.25" 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 stan