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Old 03-16-2020, 02:48 PM   #1 (permalink)
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I've read a few posts over the past couple years, but can't seem to find what I'm looking for. 2018 XCR 800 Switchback.

For changing these, you just need the 4 rubber cylinder inserts, correct? (3023291 and 3023290) I see there are PTO and MAG side part numbers - I thought I read somewhere to use the MAG or PTO side parts for both?

And the bolt that takes them out, the big hex, that's it on each corner?

Thanks for tips in advance.
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Old 03-16-2020, 05:02 PM   #2 (permalink)
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PTO side for all 4


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Old 03-16-2020, 06:30 PM   #3 (permalink)
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Why do you need to change them?
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Old 03-16-2020, 07:32 PM   #4 (permalink)
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Polaris made the mounts different durometers so the Mag side could rotate forward under load. This causes the engine to rotate around the torque link and enables the clutches to better align. If you install all the same harder durometer mounts, you are hurting this self-alignment action IMO.

Some who did this complained about excessive engine vibration into the chassis. They removed them.
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Old 03-17-2020, 09:05 AM   #5 (permalink)
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Current Sled(s): 2018 XCR Switchback 800, 2016 Switchback 800
Previous Sled(s): 2008 Switchback 700, 1993 XCR 440
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19-20 Mileage: 6535
18-19 Mileage: 4820
17-18 Mileage: 5280
16-17 Mileage: 3660
Age: 53
Riding Since: 1966
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@patrioticinnovations - I'll take that advice and get the 2 sets.

Why change them? I can see a large space that has developed on one side of each mount in the cylinder - I know those did not have spaces at the beginning of the season, and I can only assume the motor is torqueing around in the mount cradle much more than it did when it was "new".

I should have posted that I have about 6500 miles on the sled.
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Old 03-17-2020, 09:59 AM   #6 (permalink)
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Current Sled(s): 2015 AXYS Pr-S SB Ann 800, 2019 Indy 850.
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19-20 Mileage: 715 so far
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It pays to install a ratchet strap around both clutches to see how much the engine rotates under load. When I did this on my 2015, it moved backwards about .052", but was still twisted too far forward by about .030" or more. The center to center is supposed to be 10.625". This can be measured with a machinist's tee square. Mine was about .080" too wide. You need the factory alignment bar installed as well to see how it may affect alignment.

When replacing mounts, there is a recommended tightening sequence starting at left rear, left front, right rear, right front. When I did this without replacing mounts, my c-c improved as did alignment.
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Old 03-18-2020, 09:30 AM   #7 (permalink)
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Current Sled(s): 2018 XCR Switchback 800, 2016 Switchback 800
Previous Sled(s): 2008 Switchback 700, 1993 XCR 440
Location: Lakeville, MN
Favorite Riding Area: Northern MN
19-20 Mileage: 6535
18-19 Mileage: 4820
17-18 Mileage: 5280
16-17 Mileage: 3660
Age: 53
Riding Since: 1966
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This is the MAG Rear - the MAG Front looks about the same, the PTO sides don't look quite as bad, but still mushed on one side.
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Old 03-18-2020, 11:22 AM   #8 (permalink)
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Previous Sled(s): 2003 XCR 1100, 2000 XCR 800 turbo, 2005 Redline Revolt 800.
Location: SE Lower Michigan
Favorite Riding Area: Cadillac, Gaylord
19-20 Mileage: 715 so far
18-19 Mileage: 849
17-18 Mileage: 1280
16-17 Mileage: 1115
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It might be interesting to install a factory alignment tool to the CVT and see how much this has affected alignment.
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Old 03-18-2020, 11:42 AM   #9 (permalink)
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Current Sled(s): 2018 XCR Switchback 800, 2016 Switchback 800
Previous Sled(s): 2008 Switchback 700, 1993 XCR 440
Location: Lakeville, MN
Favorite Riding Area: Northern MN
19-20 Mileage: 6535
18-19 Mileage: 4820
17-18 Mileage: 5280
16-17 Mileage: 3660
Age: 53
Riding Since: 1966
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Quote:
Originally Posted by patrioticinnovations View Post
It might be interesting to install a factory alignment tool to the CVT and see how much this has affected alignment.
Yes it would, I don't have one.

One more question for you, it looks like I have to take the primary off to get to that front PTO mount? - mine has electric start so that gear sticks out just enough that the big allen wrench is right up against it!!
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Old 03-18-2020, 12:32 PM   #10 (permalink)
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Current Sled(s): 2015 AXYS Pr-S SB Ann 800, 2019 Indy 850.
Previous Sled(s): 2003 XCR 1100, 2000 XCR 800 turbo, 2005 Redline Revolt 800.
Location: SE Lower Michigan
Favorite Riding Area: Cadillac, Gaylord
19-20 Mileage: 715 so far
18-19 Mileage: 849
17-18 Mileage: 1280
16-17 Mileage: 1115
Riding Since: 1982
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Quote:
Originally Posted by Mag6240 View Post
Yes it would, I don't have one.

One more question for you, it looks like I have to take the primary off to get to that front PTO mount? - mine has electric start so that gear sticks out just enough that the big allen wrench is right up against it!!
I don't recall having to do that. But, I wasn't replacing mounts, just retorquing them. I may have used allen sockets also. I know I kept the alignment bar in the primary while doing it.

Post#919 on my thread.
https://www.hardcoresledder.com/foru...es-oil-92.html
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