Arctic Cat Catalyst 858
- Thread starter kanedog
- Start date
A
agreed!
Yup the 858 looks good!
One thing I would like to see is a Catalyst mountain hanging from a scale, I am sure this will happen soon.
The other thing I need is to ride one hopefully AC has some demos out this winter.
One thing I would like to see is a Catalyst mountain hanging from a scale, I am sure this will happen soon.
The other thing I need is to ride one hopefully AC has some demos out this winter.
Curious about a few things
-accentric top pulley on beld drive
Is that going to tip the secondary, belt misslignment?
-new gauge
Super fancy and satisfies all peoples wants. But can't please everybody like me
I really like the buddy finder and the engine vitals. Could care less about the rest
Where's the giant battery for that
- handling
After I got the gen 5 and have hated every minute of it, I think I need to ride one before I waste another twenty grand.
The front end is jacked up like the doo and has me nervous
-accentric top pulley on beld drive
Is that going to tip the secondary, belt misslignment?
-new gauge
Super fancy and satisfies all peoples wants. But can't please everybody like me
I really like the buddy finder and the engine vitals. Could care less about the rest
Where's the giant battery for that
- handling
After I got the gen 5 and have hated every minute of it, I think I need to ride one before I waste another twenty grand.
The front end is jacked up like the doo and has me nervous
Heard one thing about the gauge that’s not very good. It’s using radio frequency for the group rides which doesn’t work in Canada.
As I understand it, they did that to keep a common chassis between trail, x-over and mountain. So if you're going to actually change the gear to a different size, the secondary clutch side is also adjusted. Hopefully, they kept the 3 positions equidistant to the primary, so that a primary belt change isn't required.
R
Thats the point of the tcl, it allows movement without misalignment.
Any solid rumors on a turbo attached to that mill??
That’s probably not as much of an issue with the “self adjusting” belt deflection, within reason of course. If it pushes the secondary a tad further away, the belt will just ride a smidge lower in the secondary.
That's how the Polaris 7s works too
Yes solid has it built for the 600 and ready to tune for the 858 according to the sw podcast
R
The eccentric moves the bearing up and down. the play in the motor mounts move up and down. So the tcl rotates around the crankshaft. Does that make sense?
Also were not talking very much movement, like mms not inches.
Also were not talking very much movement, like mms not inches.
Traditionally there is an angular mis-alignment bearing on both ends of the cat jackshaft so the motor mounts aren't going to have to flex when the belt drive (exhaust side) moves. The biggest worry I have with the eccentric adjustment on the one end, but not the other is not C-C distance as the belt deflection is going to take that up. I'm more worried about holding the clutches parallel. Maybe it's not a big deal and the amount it can get out of spec isn't any more than it was with the movement of the motor/TCL system. I couldn't see what it takes to adjust the eccentric. Either on the production 600s on the ground or on the one on stage with the 858 in it. Either it's really simple and I just wasn't seeing it, or it's going to be a bugger. The "shiny" part that everyone was noticing in the photos last spring is a just a gloss black part of the chassis that shows through the holes in the back of the belt drive case.
Good news is the double nuts are gone on the brake side! Bad news is they are back on the belt-drive side. At least if they come off there's less chance they will go through the clutches.
I'm curious why they went back to an aluminum TCL too from the composite one they've been using since 2021? Looks like the same clutch setup as past years.
Good news is the double nuts are gone on the brake side! Bad news is they are back on the belt-drive side. At least if they come off there's less chance they will go through the clutches.
I'm curious why they went back to an aluminum TCL too from the composite one they've been using since 2021? Looks like the same clutch setup as past years.
Here's some photos I took of the 858 cutaway Cat had on display at Hay Days. The exhaust valve setup is much simpler than in the past. Still operated by a servo motor, but it's a single, heavier duty push-pull cable that operates both. Should stay in adjustment better than the old system and less chance of throwing a cable. The way the powervalve flap operates in an arc rather than a slide down towards the piston should help alleviate the old problem of the slide touching the piston after the stops wear in the cylinder. Engineers claimed the old system used 30 parts per cylinder and the new system cuts that in half. Good Job Cat!
V-force reeds are standard.
Better cooling for the stator. Holes are larger in the recoil cover and open on the bottom.
No one would talk about HP numbers other than 11% more than current 800. On stage they said 4% lighter than the 600, but overheard an engineer say it's actually 4% lighter than the current 800. The castings look like an effort was made to make it lighter over previous generations.
V-force reeds are standard.
Better cooling for the stator. Holes are larger in the recoil cover and open on the bottom.
No one would talk about HP numbers other than 11% more than current 800. On stage they said 4% lighter than the 600, but overheard an engineer say it's actually 4% lighter than the current 800. The castings look like an effort was made to make it lighter over previous generations.
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There was an 858 motor in a chassis up on stage with the plastic off of it. I asked nicely and they let 1-2 people up at a time to get a closer look. Can see the routing of the new exhaust valve cable. and where the exhaust will exit out under the chassis spar.
There appears to be a new, small electric pump that I assume is feeding coolant to the throttle bodies. Throttle bodies have always had the coolant run through them to keep from having freeze-ups, but not sure why they are doing it this way other than maybe they are able to regulate intake air temp better this way?
The engine is as low and as far back as they could get it in the chassis. The water pump on the backside of the crank is right up against the heat exchanger within 3/8" I would say. There is no engine plate of any kind. There is a plate welded in the bottom of the steel chassis and I think the engine case is bolted straight to it. The recoil cover is specially formed to clear the bottom frame tube of the chassis.
The roller for the recoil rope is a nice touch. This picture was from a 600 but the 858 had it too.
There appears to be a new, small electric pump that I assume is feeding coolant to the throttle bodies. Throttle bodies have always had the coolant run through them to keep from having freeze-ups, but not sure why they are doing it this way other than maybe they are able to regulate intake air temp better this way?
The engine is as low and as far back as they could get it in the chassis. The water pump on the backside of the crank is right up against the heat exchanger within 3/8" I would say. There is no engine plate of any kind. There is a plate welded in the bottom of the steel chassis and I think the engine case is bolted straight to it. The recoil cover is specially formed to clear the bottom frame tube of the chassis.
The roller for the recoil rope is a nice touch. This picture was from a 600 but the 858 had it too.
I also asked if this was going to be a limited build engine the first year like Polaris did with the 9R. They said no and they were hoping to get a lot of them on the snow. We'll see if snow checks sell out again I guess.
Bore size of the 858 is the same as the current 800, but with a longer stroke and a longer rod.
Bore size of the 858 is the same as the current 800, but with a longer stroke and a longer rod.
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R
The "pump" youre seeing is the idle air controller.
Ah that makes sense! Hopefully that makes for less variability in some sleds idling high or low without having to issue new computer flashes to fix.
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