Anyone know what the primary spring is on the 12' RMK?
RMK 155" Primary Spring
- Thread starter ReTodd
- Start date
bootz:
This is out of the Starting Line catalog. Explains what the different spring rates will do as far as engagement and peak RPM.
SLP Logical High Performance Drive Clutch Springs
for Polaris
Product Information:
Part # Description Retail Action
40-66 Black/Silver Drive Spring, 120/300 24.95
40-67 Black/Yellow Drive Spring, 120/310 24.95
40-68 Black/Red Drive Spring, 120/320 24.95
40-69 Blue/Silver Drive Spring, 140/300 24.95
40-70 Blue/Yellow Drive Spring, 140/310 24.95
40-71 Blue/Red Drive Spring, 140/320 24.95
40-72 Green/Silver Drive Spring, 160/300 24.95
40-73 Green/Yellow Drive Spring, 160/310 24.95
40-74 Orange/Silver Drive Spring, 170/300 24.95
40-75 Black/Pink Drive Spring, 120/340 24.95
40-76 Blue/Pink Drive Spring, 140/340 24.95
40-77 Green/Pink Drive Spring, 160/340 24.95
SLP's line of drive springs allows you to choose a spring that not only gives you the engagement that you desire, but also delivers proper peak RPM. For higher engagement, increase the 2.50" compression rate. For lower engagement, decrease it. For higher peak RPM, increase the 1.25" compression rate. For lower peak RPM, decrease it.
Manufactured using only the Highest Quality Chrome-Silicone wire that has been shot peened to make a very durable spring that is resistant to sag and breakage.
"Setting the World's Performance Standards"
This is out of the Starting Line catalog. Explains what the different spring rates will do as far as engagement and peak RPM.
SLP Logical High Performance Drive Clutch Springs
for Polaris
Product Information:
Part # Description Retail Action
40-66 Black/Silver Drive Spring, 120/300 24.95
40-67 Black/Yellow Drive Spring, 120/310 24.95
40-68 Black/Red Drive Spring, 120/320 24.95
40-69 Blue/Silver Drive Spring, 140/300 24.95
40-70 Blue/Yellow Drive Spring, 140/310 24.95
40-71 Blue/Red Drive Spring, 140/320 24.95
40-72 Green/Silver Drive Spring, 160/300 24.95
40-73 Green/Yellow Drive Spring, 160/310 24.95
40-74 Orange/Silver Drive Spring, 170/300 24.95
40-75 Black/Pink Drive Spring, 120/340 24.95
40-76 Blue/Pink Drive Spring, 140/340 24.95
40-77 Green/Pink Drive Spring, 160/340 24.95
SLP's line of drive springs allows you to choose a spring that not only gives you the engagement that you desire, but also delivers proper peak RPM. For higher engagement, increase the 2.50" compression rate. For lower engagement, decrease it. For higher peak RPM, increase the 1.25" compression rate. For lower peak RPM, decrease it.
Manufactured using only the Highest Quality Chrome-Silicone wire that has been shot peened to make a very durable spring that is resistant to sag and breakage.
"Setting the World's Performance Standards"
The first # relates to the rpm's the clutch will engage at. The lower the # the lower the engagement rpm's. The second # relates to the top engine rpm's. Too low first nunber and bottom end will be soft. Too high first # and engagement will be harsh and can cause trenching. Too low second # and you may not hold rpm's and cause heat. Too high second # and you could over rev and not upshift. That is the basic version as there are other factors involved in it like primary weights and secondary setup.
Last edited:
I changed my primary spring on a 2012 600 RMK with the snowmobile already geared down........what a difference the H5 speedwerx spring makes. I noticed a change right from the start. It will hold 8200-8300 RPMs in the POW.......peaks out @ 8350 sometimes. Very glad with this purchase!!! Tks for all the recommendations....
