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2018 Polaris Assault SB 800, 2018 Polaris SB Pro S 800, 2015 Polaris Rush ProS 600
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I've heard it was heavily reworked so it could better compete with the 650...

Sorry, I just couldn't hep myself. 馃榿
And yes, I have a 650. No, it's not as fast as an 850. Or an 800.
No worries, we wanna hear about the kids sleds as well 馃槈
 

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It's hard to say from the video because that information is confusing. I also noted on the Turbo's the ECU looks like its mounted in a new location? It sounds to me like the Boost gets a new flywheel and ECU. Does the N/A version or you guys are saying we already have it on the 21? Is the ECU on the 19-20 850 different?
In the video Erik is just talking about the mountain lineup, given his location I doubt he even sells any trail sleds. Lennstang though, also mentioned in his 2022 review that the 850's ran stronger than the 21's when lined up.
Looking again in the online parts lookup on Polaris website, I was wrong in what I said above. Only the 2021 850 VR1's & Assault show a different ECU, see below, the 650's apparently use the same ECU as them too. The rest of the '21 850's show the older 4018714 ECU still. They all still show the old 4017455 flywheel though, even on the machines with the new ECU.
2121083
 

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2018 Polaris Assault SB 800, 2018 Polaris SB Pro S 800, 2015 Polaris Rush ProS 600
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Ride one then get back to me.
Come on now, just teasin bro. Can鈥檛 be dishin it out but can鈥檛 take one back lol. I鈥檝e ridden more than one of em. Crazy power for a 650.
 

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2018 Polaris Assault SB 800, 2018 Polaris SB Pro S 800, 2015 Polaris Rush ProS 600
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Ditto that my 2015 switchback 800 rocks. Reliable, fast. Bought a 2016 (same sled) for the old lady and its good but has had some issues
What kinda issues?
 

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They changed the flywheel to have 21 teeth on it from the previous 5. So the computer can now read the crankshaft position much higher resolution. Better starting and throttle response. 20% better response
 

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MY21 650 SBA 146, ES, ICE Storm 1.5
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Over 7 months ago, I went thru the differences and similarities of the Matryx chassis, and engines versus Axys sleds. If you look at the line for the ECU and the line for the VES Actuator, you can see they were identified then as being different in Matryx 850/650 verus My21 Axys 850. So, this is really old news.

It just appears that the fellow doing the video on the MY22 Matryx Mountain sleds, wasn't aware of what had already been done on the MY21 Matryx flatland sleds.

MATRYX Engine & Chassis parts specs & differences post#1
 
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Discussion Starter · #31 ·
So, I guess the answer is: There may have been a change for 2021 but not on the 2022 850 XCR motor.
I hope so as I did not care much for the 2020 850 motor
 

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The engine or the tuning of the 20 ? They are sperste from one another. Most runability changes come from mapping etc. not so much from a change in a proven engine.
 

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There is a change on the 2022 motors. Like I said flywheel has been changed for better starting and better run ability. It has higher resolution on reading the flywheel. 20% better response. The people that have rode the 2022s say it is a very noticeable difference.
 

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They changed the flywheel to have 21 teeth on it from the previous 5. So the computer can now read the crankshaft position much higher resolution. Better starting and throttle response. 20% better response
Wonder why they went with an odd number so they wound up with a fractional number of degrees between sensor pulses? 20 would have made it 18 deg vs 17.14 deg for 21.

Over 7 months ago, I went thru the differences and similarities of the Matryx chassis, and engines versus Axys sleds. If you look at the line for the ECU and the line for the VES Actuator, you can see they were identified then as being different in Matryx 850/650 verus My21 Axys 850. So, this is really old news.

It just appears that the fellow doing the video on the MY22 Matryx Mountain sleds, wasn't aware of what had already been done on the MY21 Matryx flatland sleds.

MATRYX Engine & Chassis parts specs & differences post#1
This isn't old news, looks like they just unleashed part of the new MATRYX ECU capability in 21 by only updating the valve controls.
As snowmachine stated and I originally questioned 2 months ago, several different people who all rode the 22's (trail & mtn) have said they noticed something different vs the 21's.
Your charts in that link don't cover anything about the flywheel, which hasn't changed part numbers between 2019 and 2021, so the 21's didn't get the higher resolution version.
 

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MY21 650 SBA 146, ES, ICE Storm 1.5
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There is a change on the 2022 motors. Like I said flywheel has been changed for better starting and better run ability. It has higher resolution on reading the flywheel. 20% better response. The people that have rode the 2022s say it is a very noticeable difference.
At this time the Online parts shows the same 4017455 flywheel and 4017454 stator used on MY20 850, and MY21-22 650 and 850.
 

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2021 Matryx VR1 850 137 Storm
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Here's what I was told by Polaris: 850 has Lighter flywheel, improved power boosting regulator, and a new map. After spending quite a bit of seat time on a demo 2022 850 129 VR1, I can confirm that it's quicker than my 2021 850-137 VR1. Spools up quicker and accelerates hard. Very impressive top speeds of speedo indicated 115+ MPH. It did this consistently. It easily walked by my 2021 in a drag race. And mine was studded with real studs. The Demo unit I rode had the Ice Ripper track. Mine has the 1.5 Storm.
 

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Hope it pans out that way for MY2022. Shows the effectiveness of studs unless on ice or hard pack. Pick lug height and traction products for the conditions that are 鈥渘ormally鈥 encountered.
 

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Here's what I was told by Polaris: 850 has Lighter flywheel, improved power boosting regulator, and a new map. After spending quite a bit of seat time on a demo 2022 850 129 VR1, I can confirm that it's quicker than my 2021 850-137 VR1. Spools up quicker and accelerates hard. Very impressive top speeds of speedo indicated 115+ MPH. It did this consistently. It easily walked by my 2021 in a drag race. And mine was studded with real studs. The Demo unit I rode had the Ice Ripper track. Mine has the 1.5 Storm.
Thanks Lenn exactly what I was hoping to read. These would be fantastic improvements if they can sharpen up the idle mixture a bit!
 
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