Who has the best mountain clutching for a 872 ? My buddy has a Trygstad 872 and he is having a hard time getting it clutched correctly. Its a 15 xm 174. We ride West Coast area at around 6500 ft. Any help ,comparisons in clutch kits would be appreciated.
Who has the best 872 clutching for the mountains?
- Thread starter sledhead9825
- Start date
Here is what I run
primary,
130-380 HRSS spring
HRSS #2 ramps
Fhett bros 39 gram arms
16.9 solid pins
Secondary
44-38 helix
215-315 HRSS spring
2.44 gearing, clicker 3-4 Depending on snow.
25% 110 fuel blend
9000 ft and up on a 2016 TMS 872 with 174 track, stock exhaust
primary,
130-380 HRSS spring
HRSS #2 ramps
Fhett bros 39 gram arms
16.9 solid pins
Secondary
44-38 helix
215-315 HRSS spring
2.44 gearing, clicker 3-4 Depending on snow.
25% 110 fuel blend
9000 ft and up on a 2016 TMS 872 with 174 track, stock exhaust
Last edited:
What is it not doing? hold rpm?
Not holding Rpm at end of long pull. Drops down to 7600 Rpm
Whatever primary clutch spring is in the clutch - take the final force and raise it by 30 lbs.
Example: 160/320 and drifting engine speed down to 7600 then go to a xxx/350 or go to a xxx/380 final force.
That should allow the engine to not lose speed that much and fluctuate 100+/- rpms.
WOW !!! Thats it ? Anybody else ??
Y
^^DJ has great advise, I would take it you wont be disappointed!
Roost built was very successful clutching the trygstad 872. There was 5 in the regular riding group. They sold many others with great results.
I
I backshift !!!
Buddy Had HRSS did not work........
Has Joe's Stuff in it now,:face-icon-small-hap night and day difference, but we do have "cascade concrete"........
Buddy Had HRSS did not work........
Has Joe's Stuff in it now,:face-icon-small-hap night and day difference, but we do have "cascade concrete"........
This maybe a stupid question, but who is HRSS?
Hot Rod Sled Shop
Ok thanks,
HRSS stuff works phenomenal if you tell them exactly the application ( track length, lug height, snow and elevation for setup) .. I believe mtncat has 8-10 sleds on a stocker..call the shop if something's not working as it should...
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F
we have 2 872 s in our barn . both 15 t3 s a 163 and 174 , 163 is a higher compression setup than the 174. we used joey"s setup on both .the 174 was a piece of cake ,dropped the kit in and it was bang on from day one . the 163 not so much ,but with a few phone calls to joe and a different set of ramps and spring it runs like a champ . might want to build a tiny bit of over rev into your weight setup . 8100 right off the line will give you 8000 on a pull . funny thing the 174 works better at a lower clicker setting [shallower ramp angle ] than the 163.the 174 is a beast still pulls a bunch more track speed and ground speed than the 163 . this is climbing or in the deep. would not hesitate to use dj again , but if you start talking clutch theory be prepared to have your head messed up for a bit . lmoa 
S
Just checked out the HRSS ramp profile pics. They look good. Can't see how those cant be made to work extremely well with a big bore. I know DJ's stuff works, but to say HRSS doesn't as a general statement isn't right. Run both 880 and 872 and do not run any "kits" but have messed around enough to get an idea of what I want a ramp to do. Might have to get some of the HRSS2 to put in 880.
Have used Joe's clutching in two different 872's and have been impressed.
S
Would totally listen to Joey. My 872 clutching is spot on. Holds 8000 rpms all day long. Guy is a wizard with Skidoo clutching
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Give Dean a call at Mad Motor sports in Laduc Alberta ,he's got a good kit for the 872.
Just finished a couple days in Togwotee, 872, with Joeys kit. Still in break in mode, worked phenomnol.
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