Stm secondary clutch - HCS Snowmobile Forums

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Old 04-03-2019, 05:57 PM   #1 (permalink)
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Default Stm secondary clutch

What's some of you guys opinion on the stm secondary clutch? Work better than the team? And what setups are being used?
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Old 04-03-2019, 07:23 PM   #2 (permalink)
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I have one way better, green spring 40/35, smooother no belt dust if setup right.
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Old 04-03-2019, 07:42 PM   #3 (permalink)
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I'm thinking of going that route. For long toned runs. Looking at the team clutch looks like it no where's near efficient as the stm.
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Old 04-03-2019, 08:02 PM   #4 (permalink)
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I’ve been playing with one, not 100% on the helix end of things so I’ll keep trying different angles. Straight 45 seems to work pretty good!
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Old 04-05-2019, 10:01 AM   #5 (permalink)
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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
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Old 04-05-2019, 03:01 PM   #6 (permalink)
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Quote:
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
thanks for the input.
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Old 04-05-2019, 04:26 PM   #7 (permalink)
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Current Sled(s): 17 zr 9000
Previous Sled(s): Crossfire7, 2012 f1100 turbo
Location: Ny
Favorite Riding Area: Speculator/sacandaga
18-19 Mileage 1600
17-18 Mileage: 1300
16-17 Mileage: 1200
15-16 Mileage: 100
Age: 60
Riding Since: 1982
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Quote:
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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Old 04-06-2019, 08:38 AM   #8 (permalink)
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My conversation was with STM and there clutches on the new 998 turbos. They told me they were not built to run over 8500 rpm. I bought the 4 tower pro4 Incase I want to go to a higher HP tune some day. I believe my weights are 80 grams ( not 100% sure on that )
Yes my center bushing on my STM secondary went out.
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Old 04-07-2019, 01:03 PM   #9 (permalink)
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any pro4 dealers in canada?
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Old 04-07-2019, 03:56 PM   #10 (permalink)
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I’m not sure on dealers in Canada but google Pro4 and call mark and he’s a great guy and I’m sure he’ll lead you in the right set up for your application and ship it also.
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