2019 Cat Primary Clutch Not Shifting Fully

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whittaker727

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Nov 26, 2007

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Naples, Id

• Dec 20, 2018

• #1

Curious what others are or are not seeing. 2019 Silber Alpha running 5 psi on two separate sleds and we are both lacking roughly 1/2" - 3/4" from being fully shifted out. Stock helix, aftermarket springs in both and weights loaded toe heavy to 78 & 80 grams. Both pulling 8400-8450 rpm.
We also have an 18 Cat with a can and MDS clutching that is fully shifted to the edge of the primary. Was there a change in the clutches or their geometry for 19 that could be an issue? We don't have a stock Alpha or other 19 Cat to compare against.

 

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kiliki

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• Dec 20, 2018

• #2

2019 mt with silber at 6 psi 80g light in the tip and more mid load. I'm getting out to the last 1/4 of the primary but I did not put in the secondary spring provide by silber. the stock spring has a 20 lb less top finish rate.

 

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NorcalSled

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Oct 15, 2018

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• Dec 20, 2018

• #3

whittaker727 said:

Curious what others are or are not seeing. 2019 Silber Alpha running 5 psi on two separate sleds and we are both lacking roughly 1/2" - 3/4" from being fully shifted out. Stock helix, aftermarket springs in both and weights loaded toe heavy to 78 & 80 grams. Both pulling 8400-8450 rpm.
We also have an 18 Cat with a can and MDS clutching that is fully shifted to the edge of the primary. Was there a change in the clutches or their geometry for 19 that could be an issue? We don't have a stock Alpha or other 19 Cat to compare against.

Click to expand...

Are you using Silber's clutching or did you go with Cycles & Sleds clutch kit?

I installed Cycles & Sleds kit on my 18 Mountain Cat but haven't got it on the snow yet, will check it out once I do.

 

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whittaker727

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• Dec 20, 2018

• #4

NorcalSled said:

Are you using Silber's clutching or did you go with Cycles & Sleds clutch kit?

I installed Cycles & Sleds kit on my 18 Mountain Cat but haven't got it on the snow yet, will check it out once I do.

Click to expand...

We have one of each. Same problem with both. Could also be the TKI belt drive. We opted for stock gear ratio, so I highly doubt that is the issue, but stranger things have happened.

 

JMCX

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• Dec 20, 2018

• #5

I put a black stripe on mine and it's gone. Stock sled.

 

kanedog

Undefeated mountain clutching champ of the world.

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• Dec 20, 2018

• #6

The rpms seem good and the only way to get the belt to ride higher on the primary is to gear down.
Cat 1-1 ratio is 67mph and 74mph fully shifted out(full overdrive) so unless you have terrain where 67 or 74 can be achieved, the belt won’t go higher.
I like to gear down until I use all the sheave.

 

Last edited: Dec 20, 2018

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whittaker727

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• Dec 21, 2018

• #7

So that would lead me to believe that everyone with a stock geared, boosted sled is seeing the same thing on their clutches? I'm sure I'm not the only one who would have noticed this by now.

 

skidooboy

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• Dec 22, 2018

• #8

https://www.snowest.com/forum/showthread.php?t=445957
read post 4, might want to check which primary shim situation you have, this maybe your issue. Ski

 

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whittaker727

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• Dec 22, 2018

• #9

I might be willing to accept that possibility if it weren’t for the fact that 2 sleds from 2 different dealers in different states set up very close to the same are having the same issue. If that were the case, I would also think this would be applying to naturally aspirated sleds as well. At this point, all clutching aside from the stock helix has been changed.

 

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Kunt

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Squamish BC

• Jan 6, 2019

• #10

whittaker727 said:

I might be willing to accept that possibility if it weren’t for the fact that 2 sleds from 2 different dealers in different states set up very close to the same are having the same issue. If that were the case, I would also think this would be applying to naturally aspirated sleds as well. At this point, all clutching aside from the stock helix has been changed.

Click to expand...

I have a silbered alpha same issue.

 

kanedog

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• Jan 6, 2019

• #11

Post pics of the primary sheave and then we can compare each clutch and belt travel.

Sent from my SM-G920W8 using Tapatalk

 

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kiliki

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• Jan 7, 2019

• #12

Kunt said:

I have a silbered alpha same issue.

Click to expand...

use the stock secondary spring and it will shift all the way.

 

madmax

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• Jan 7, 2019

• #13

Most mountain sleds will rarely ever see the 60-70mph speeds necessary to shift out all the way. If they do it’s only for a very short period of time. Probably 80% of your time will be in half way shifted out rsnge or less. So most of you clutch wear will be in the first half of the clutch. I have 250 miles on my turbo alpha and I doubt it’s ever seen 60mph, probably mostly lives at 30-48mph which is where my clutch marks (wear) are.