HCS Snowmobile Forums - View Single Post - Stm secondary clutch
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Old 04-05-2019, 04:26 PM   #7 (permalink)
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crossfire12's Avatar
Join Date: Dec 2010
Posts: 1,417
Current Sled(s): 17 zr 9000
Previous Sled(s): Crossfire7, 2012 f1100 turbo
Location: Ny
Favorite Riding Area: Speculator/sacandaga
19-20 Mileage:
18-19 Mileage: 1600
17-18 Mileage: 1300
16-17 Mileage: 1200
Age: 60
Riding Since: 1982

Originally Posted by kdf1157 View Post
I had STM on my secondary and a STM movable sheave on my primary (1100 turbo) and my bushing went out on my secondary after it had been gone thru and I did send it to STM and they said that was no good and for 750.00 i could buy another one.
I now have a 2017 turbo and before I bought it I questioned a lot of people and did speak to 2 people from STM and was told that they do not recommend running there clutches any higher than 8500 (new 3 cyl. engines like to run 88 to 9000)so I bought the Pro4 primary and secondary and have been very pleased with them and now have 2000 miles on them with no problems and my belt temps went from 160 to 190 with factory clutches to 125 to 140 with the pro4s. I do have a TD max 17 tune that I have ran ran since day 1.
Hope this helps
DID a you have a STM conversion on ac secondary or a STM secondary ,What helix you running? I’ll be getting a pro 4 primary next winter. What weights are you running? I have the stm secondary for about 1500 miles so far so good, what was wearing center bushing? Thanks in advance
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