• Don't miss out on all the fun! Register on our forums to post and have added features! Membership levels include a FREE membership tier.

End of 19-20 season, 850 reviews?

H
Jun 30, 2019
52
14
8
St Anthony, Idaho
Sorry I’m sure there are threads out there like this. Where it’s the end of the 19-20 season I’d like some reviews of the 2020 850s? I can pull the trigger on a 2020 850 for next season and it will come with warranty (I’ll probably get it anyways the sled anyways) but I’ve heard a lot of negative things said about this motor and should I be scared? So just be honest and give your reviews. Have the majority of the bugs been worked out in the 2020s?
 

NHRoadking

Well-known member
Lifetime Membership
Premium Member
Apr 23, 2012
1,660
2,001
113
I thought some 2020s were having spark plug fouling and bogging issues? Did those get fixed with software updates?
 

Wheel House Motorsports

Well-known member
Lifetime Membership
Nov 27, 2007
29,932
5,966
113
34
SW MT
2020 khaos 850, 1100 miles and counting. bogged like 1 or 2 times during breakin, otherwise the thing has run like a top. Stock plugs the whole time.

The 20's sorted out all of the original MFG bugs of the '19 motor and they are rocking now.
 
S

Snopro_69

Well-known member
Mar 25, 2008
754
230
43
37
Saskatchewan
2020 rmk 850 here. Love the sled/power but it did cut my last trip short. The exhaust valves motor is not working. Throws a code and runs like crap. Couldn't even wire them open and unplug it. Still ran like junk. Hopefully finally be able to have the dealer take it in this week and fix it for next season I guess. Stupid covid

Sent from my SM-G960W using Tapatalk
 
F

Fredrik

Active member
Nov 29, 2007
139
27
28
42
Is there any visual difference between 2019 and 2020 motor,so you can tell if 2019 with replaced engine has 2019 or newer engine.
 

Sled Solutions

SnoWest Forums Sponsor
Lifetime Membership
Premium Member
Dec 3, 2007
5,351
1,210
113
Traverse City, MI
www.sledsolutions.com
Sorry I’m sure there are threads out there like this. Where it’s the end of the 19-20 season I’d like some reviews of the 2020 850s? I can pull the trigger on a 2020 850 for next season and it will come with warranty (I’ll probably get it anyways the sled anyways) but I’ve heard a lot of negative things said about this motor and should I be scared? So just be honest and give your reviews. Have the majority of the bugs been worked out in the 2020s?

I have a 2020 Khaos 850 and it was 100% flawless this past winter...very impressed with the power and fun factor. I wouldn't fear the motor at all, the updates they made for the 2020 sleds have been successful IMO.
 

Timbre

Well-known member
Premium Member
Nov 1, 2008
2,812
2,504
113
Southwestern Idaho
Didnt get to ride as much as in a normal season due to covid restrictions, but my 2020 850 Axys 163" ran absolutely perfect. LOVE THIS SLED!!!
 

pepperhouse

Well-known member
Premium Member
Jan 28, 2010
96
50
18
19’ with 1500km
Had oil line fix at 400km’s and it’s been a monster since.
The 18’ turbo at 10#s sits in the garage collecting dust.
 

cnote

New member
Lifetime Membership
Sep 2, 2014
6
4
3
My '19 850/155 has almost 900 mountain miles now and I'm still on the original plugs, original flash, running VES extreme. Has not missed a beat in two seasons, could not be happier with it! Well, I had powder bogs season 1 but that went away with the SLP high flow intakes for season 2. I'm actually looking to pick up another 850 to keep it company and I wouldn't hesitate to buy another '19.
 

goridedoo

Well-known member
Premium Member
Feb 8, 2010
3,864
3,533
113
1100 miles of beating the chit out my 2019 and I just love it, thing absolutely rips. I have had 3 times where its flooded when I go to start it in the morning, pull the plugs, clear the cylinders, new plugs and its good to go. I currently have the 19.5 flash, but will be getting the newest one before next season, they once again are claiming the starting issues have been resolved.

I wouldn’t hesitate to buy another, especially a 2020.
 

Murph

Polaris Moderator/ Polaris Ambassador/ Klim Amb.
Staff member
Lifetime Membership
Respondents--- mileage is important. Sleds @ 2000 miles can reveal a lot of issues that won't pop up in 3-500 miles.

2020 ProRMK 163, Khaos Geometry, 7" shorter tunnel running MTNTK 5' cooler (stock coolers are not plumbed in)

2400 miles--- no mechanicals
Couple of electrical failures-- Water Temp sensor (twice until the latest sensor fix good now), EGT sensor (same sensor they ran since 2018-- think it was an anamoly)

I would steer clear of a 2019 without the FULL 2020 updates (groove in case/ lockring versus loctiting bearing to case half)

850 motor pulls a LOT different than 800. My initial reaction to riding mine was "uh-oh" thinking I just wasted $15,000.... as the motor broke in, it got stronger and stronger. After rebuilding one of my 800s, I was able to ride them back to back in the same conditions. The 800 is snappier and revs faster, the 850 just PULLS like a freight train. Pulls a lot harder in deep, steep trees.

Will be transitioning my personal sleds (four Axys 800s, one 850) to all 850s.
 
Premium Features