here we go...

 

from https://www.facebook.com/photo.php?fbid=645480526946814&set=a.282183209943216&type=3&comment_id=3293263380957604&notif_id=1662840248855637&notif_t=feedback_reaction_generic&ref=notif

 

https://snowgoer.com/news/cat-unveils-new-catalyst-chassis-for-2024-kind-of/31001/

 

 

how much actual chassis was changed? IDK the RXC looks good though, I dig it.  edit: 137" ?  hmmmm... 

pile on boys, this isn't the brand specific safe space... and don't forget to in on one. 

Edited September 10, 20223 yr by Crnr2Crnr

just dinking around looking at the 2025 models gearing and helix specs ...

M's - 63/24g 48h

Riot 600's 1.35/1.75 - 60/27g 56/49h

ZR RXC 600 - 58/30g 56/49h

ZR 600's - 60/27g 56/49h

Riot 858's 1.75 -60/27 with 0748-059 helix?

Riot 858's 1.35 58/30 with 0748-059 helix?

ZR 858 - 58/30g also with 0748-059 helix, which shows discontinued? anyone ever figure out which angle those actually are @favoritos or @Premium ?

seem to recall hearing about different gearing on the snow west podcast for 2026... ?

edit: found the new M 3.0 gearing 64/22 which is supposedly good for 75mph...

Edited May 2, 2025May 2 by Crnr2Crnr

21 hours ago, Crnr2Crnr said:

just dinking around looking at the 2025 models gearing and helix specs ...

M's - 63/24g 48h

Riot 600's 1.35/1.75 - 60/27g 56/49h

ZR RXC 600 - 58/30g 56/49h

ZR 600's - 60/27g 56/49h

Riot 858's 1.75 -60/27 with 0748-059 helix?

Riot 858's 1.35 58/30 with 0748-059 helix?

ZR 858 - 58/30g also with 0748-059 helix, which shows discontinued? anyone ever figure out which angle those actually are @favoritos or @Premium ?

seem to recall hearing about different gearing on the snow west podcast for 2026... ?

edit: found the new M 3.0 gearing 64/22 which is supposedly good for 75mph...

The RXC 858 helix is stamped 56/49 and is superseded with another 56/49 number. I don't know what is up with the discontinued number.

There are quite a few different part numbers for stock 56/49 helixes. I'm not sure if they changed the rate of progression? I do understand the part number change when they switched to ADAPT vs Team, but I don't know why they show differently between models in the MY 25 sleds.

12 hours ago, favoritos said:

The RXC 858 helix is stamped 56/49 and is superseded with another 56/49 number. I don't know what is up with the discontinued number.

There are quite a few different part numbers for stock 56/49 helixes. I'm not sure if they changed the rate of progression? I do understand the part number change when they switched to ADAPT vs Team, but I don't know why they show differently between models in the MY 25 sleds.

Maybe a vendor change??

On 5/3/2025 at 8:43 AM, favoritos said:

The RXC 858 helix is stamped 56/49 and is superseded with another 56/49 number. I don't know what is up with the discontinued number.

There are quite a few different part numbers for stock 56/49 helixes. I'm not sure if they changed the rate of progression? I do understand the part number change when they switched to ADAPT vs Team, but I don't know why they show differently between models in the MY 25 sleds.

it's weird for sure as the 56-49's are literally found in everything else 2024/2025 and # 0748-050...

https://www.countrycat.com/arctic-cat-0748-050-cam-driven-56-49-eri2-w-brg?srsltid=AfmBOoorbDAdlELmUwe89kw_amvV6zZpP-zH7hfX7b8YZEcyFEMo7WV9

OEM Arctic Cat Part

CAM,DRIVEN-56-49 ERI2 W/BRG

Replaces Part # 0648-952

To my knowledge these are all new part numbers for Adapt equipped machines from 2022 and up. The 050 was used commonly in several 800cc 22 and up sleds... so my assumption was the 858's are or would be different but can't find the information?

Edited May 4, 2025May 4 by Crnr2Crnr

same # in Babbitt's or Country Cats online parts catalogs...

22 hours ago, Not greg b said:

Maybe a vendor change??

That was my assumption.

Funny thing about this, they were also in the process of moving to a new item# system.

The new numbers, three - five digets. (001-00001), do not apply to the helix. The new numbers show up in strange spots on parts diagrams. One example, the 858 primary uses the old style numbers except for the screw bushings under the cover. The 858 motor shows old numbers except on the cylinders and gasket "sets"? It's odd that some obviously new parts don't use the new numbers system while some new parts fall under the updated system.

5 minutes ago, favoritos said:

That was my assumption.

Funny thing about this, they were also in the process of moving to a new item# system.

The new numbers, three - five digets. (001-00001), do not apply to the helix. The new numbers show up in strange spots on parts diagrams. One example, the 858 primary uses the old style numbers except for the screw bushings under the cover. The 858 motor shows old numbers except on the cylinders and gasket "sets"? It's odd that some obviously new parts don't use the new numbers system while some new parts fall under the updated system.

My SWAG is that its a break between stuff developed by/under textron, vs pre-textron. The havoc/stampeede used the new numbering system (it was developed in GA), as does some of the 600 ATV

Wasn't there something with some of these OEM helixes no longer having a "rolled" bushings vs hard edged? Maybe some do some don't hence different P/Ns? I know it was implicated in some of the inconsistent RPM issues some were having, myself included. I switched to BDX for a helix which def has a rolled bushing. My issues disappeared along with some other minor clutching changes.

8 hours ago, Premium said:

Wasn't there something with some of these OEM helixes no longer having a "rolled" bushings vs hard edged? Maybe some do some don't hence different P/Ns? I know it was implicated in some of the inconsistent RPM issues some were having, myself included. I switched to BDX for a helix which def has a rolled bushing. My issues disappeared along with some other minor clutching changes.

Could be. Tpi has a secondary mod for them and that could be it.

well, that's interesting

maybe @Not greg b should tear the skid out of his XCR?

Will the 2027 858s have bolt in crossmembers on the bulkheads? Seems like warranty is gonna get expensive for them if this keeps happening.

That is the only break?

1 hour ago, racinfarmer said:

That is the only break?

That’s from the rod sawzalling through it when the motor let go at 8250

I just assumed it was a new place for the front frame to crack.

1 hour ago, Palu49 said:

That’s from the rod sawzalling through it when the motor let go at 8250

Zr6000 says user error

5 minutes ago, Not greg b said:

Zr6000 says user error

39 minutes ago, racinfarmer said:

I just assumed it was a new place for the front frame to crack.

One was rolling in when that one was rolling out, didn’t go all the way through on the second one. Both stock units, one had 1200 miles the other 4200. I have a feeling I’m gonna be good at these bulkheads by the end of winter.

16 minutes ago, Palu49 said:

One was rolling in when that one was rolling out, didn’t go all the way through on the second one. Both stock units, one had 1200 miles the other 4200. I have a feeling I’m gonna be good at these bulkheads by the end of winter.

At least cat made them easy to tear down

Report of number 3 on its way in

All 3 858s?

19 hours ago, Palu49 said:

I have a feeling I’m gonna be good at these bulkheads by the end of winter.

how many spare 10mm's do you need for this process?

2 hours ago, racinfarmer said:

All 3 858s?

Yes, I’m not sure if the rods are breaking on their own from harmonics or something or if the skirt is breaking off at the wrist pin and then rod breaks when it’s free to go wherever it needs to through the case. Everything spins free and the piston slides freely in the cylinder on the 2 I’ve had my hands on so far.

1 hour ago, Palu49 said:

Yes, I’m not sure if the rods are breaking on their own from harmonics or something or if the skirt is breaking off at the wrist pin and then rod breaks when it’s free to go wherever it needs to through the case. Everything spins free and the piston slides freely in the cylinder on the 2 I’ve had my hands on so far.

Jesus. That’s an ugly situation.

32 minutes ago, Not greg b said:

Jesus. That’s an ugly situation.

Not great for new owners

Edited December 29, 2025Dec 29 by Palu49

Well, figured out a way to get the engine and jackshaft back into alignment without tearing the whole sled apart and installing a new belt drive. Had a test piece made and brought the alignment within a couple thousandths of dead nuts which can be taken care of with a shim if desired. Gonna test it in the next couple days and see if it does what we all hope it will.