850 bogging

Teth-Air · Feb 14, 2019

XC500mod said:
After reading this whole thread is seems there are two bogs.

Bog 1 is related to break in, over revving, and ethanol mode. Which I had.

Bog 2 - the black streak bog - is related to over fueling?? Which I have never experienced with 15 hours.

Funny not all 850s have this. Mines a pro 163 2.6. My bros a 155 2.6. We both initially had bog 1.

No there are 3 scenarios.

1. in break in mode. Please don't bother reporting anything until in Non-ethanol mode and at least over 10 hours on the clock.

2. fat around 4500 rpm and fluttering throttle seems to load it up more.

3. on the pipe and it falls on its face. This one may be a symptom of too light of clutching so don't bother posting unless you try heavier weights or lighter primary spring first

It is condition 2 that is a real problem that you cannot do much about unless you get the new map.

pekka71 · Feb 15, 2019

tdblakes said:
Is something different with the international model? Sea Level weights for my 155 2.6 RMK are 10-74s...?

now have i been to the dealer and reset the exoustports, now the rpm is about 8350-8400 and it works perfect

dragona1 · Feb 15, 2019

Okay in north America is that exhaust valve relearn?

pus1100 · Feb 15, 2019

tdblakes said:
Is something different with the international model? Sea Level weights for my 155 2.6 RMK are 10-74s...?

In Norway they come setup with 10-72 900-1800 meters
Sealevel is 10-74. Mine 163 2.6 did the overrev bog with poor traction under break In. 11-76 cured that. Sealevel to 700 meters

Drago70 · Feb 16, 2019

I´ve heard from a dealer that they´ve always does a exhaust valve relearn after they´ve installed the new softvare.

jfalbert · Feb 16, 2019

Got to test the new ECU programmation today in some DEEP powder!!!

Works perfect with no Bogging at all!!!

Put back my SLP exhaust after and still no bogging
(Original plugs by the way... and I was at 23h, 500km) )
(Clutch: 10-74, primary spring 165/310, secondary is stock)

Very satisfied and stoked!

tundra · Feb 16, 2019

I have the opposite experience: 13h, new mapping, bogging down low as much as before and I think I lost power on top. 200 rpm less than with the stock mapping at low elevations. I really dissatisfied with the 850 right now .

indydan · Feb 17, 2019

Leak down test

Before anyone does a reflash, you should first do a cylinder leak down test.

Motor Performance before the reflash...... And performance results after reflash are worthless leak down numbers.

The big problem with reflashes is...... ( we do NOT know the leak down % on the sled Polaris is using for the mapping ).

Are they using a brand new motor ? With 3-1/2% leak down?

Are they using a 500 mile motor ? With 1-1/2% leak down that had a great cylinder finish and rings sealed up nice ?

Are they using a 500 mile motor ? With 7% leak down that has rings that are on their way out the door...... ( basicly junk )

You see if we knew everyone's numbers...... Then we could see who's sleds the reflash works on and if there is a correlation to the leak down numbers.

And there will be........

If you build a map on a sub-par motor the map is basicly worthless to everyone except another guy with the same sub-par motor with the exact same leak down.

If you build a map on a broke in motor with 1-1/2% leak down...... The Map will be awesome for everyone with a good solid top-end with good % numbers.

As I have said...... All the different results are worthless to the masses without leak down numbers.

Dan

indydan · Feb 17, 2019

tundra said:
I have the opposite experience: 13h, new mapping, bogging down low as much as before and I think I lost power on top. 200 rpm less than with the stock mapping at low elevations. I really dissatisfied with the 850 right now .

Dude...... do a leak down test.

99.9% chance your top-end is wasted..... My guess is.... One or both of your cylinders are well past 6%

I am going to pound this leak down test up everyone's azz until people start doing it.

Performance problems are not easily trouble shot without leak down numbers.

Do us all a favor and PLEASE post your leak down % ASAP

THANK YOU

DAN

m1kflyingtiger · Feb 17, 2019

Man why are you hitting the leak down numbers so hard all of a sudden? I’ve been on this forum for almost a decade. In that time you have been pompous, but usually provided solid information. This is getting to the point of ridiculous now though. We all get it. You want us all to be on the same level as you and do all the same diagnostic tests as you. Well it’s not going to happen. Most people aren’t going to go out and spend $150+ for a troubleshooting tool to diagnose a sled with 4 more years of warranty on it.

There are some of us that would like to discuss something other than the doomsday scenario you always bring up of all the motors being crap.

You’ve said your piece about leak down number, in multiple threads, and in the process ensured that I will NEVER purchase an Indy specialties product. Heck at this point I’d rather go support Kelsey’s buisness again than yours and I’ve actually seen the paperweights he calls big bore kits.

That’s all I have or am going to say on it btw. I will not get into the back and forth with you that has ruined so many great threads.

On a related note, I’m getting out today to test the reflash! Little rip up and down the road seemed substantially leaner and the throttle didn’t hang when I let off so it seems promising. I’ll post back tonight with results.

sum-it · Feb 17, 2019

thsnk you

snowx22 · Feb 17, 2019

Got the reflash in my 850 163 on Wednesday, had the 4500 rpm bog pretty bad here at 900 ft in North Dakota. I’m still in the break in period 7hrs/120 miles Took it out last night for a 30 mile rip and no bog that I could find, still has the throttle hang a little tho. Heading out to west Yellowstone later this week and hoping it works well out there too

Jaynelson · Feb 17, 2019

For better or worse, 99% of retail customers aren’t going to purchase/use a leak down tester on their new sled. It’s like people pulling the plugs on their new F150 to check gap...not the worst idea...just never gonna happen. For those that do, it will be interesting if there is any correlation to running issues.

For the rest, there are some great things listed in this thread to try. As teth-air mentioned...if you aren’t out of break in, don’t start changing stuff or you might chase your tail.

kanedog · Feb 17, 2019

m1kflyingtiger said:
Man why are you hitting the leak down numbers so hard all of a sudden? I’ve been on this forum for almost a decade. In that time you have been pompous, but usually provided solid information. This is getting to the point of ridiculous now though. We all get it. You want us all to be on the same level as you and do all the same diagnostic tests as you. Well it’s not going to happen. Most people aren’t going to go out and spend $150+ for a troubleshooting tool to diagnose a sled with 4 more years of warranty on it.

There are some of us that would like to discuss something other than the doomsday scenario you always bring up of all the motors being crap.

You’ve said your piece about leak down number, in multiple threads, and in the process ensured that I will NEVER purchase an Indy specialties product. Heck at this point I’d rather go support Kelsey’s buisness again than yours and I’ve actually seen the paperweights he calls big bore kits.

That’s all I have or am going to say on it btw. I will not get into the back and forth with you that has ruined so many great threads.

On a related note, I’m getting out today to test the reflash! Little rip up and down the road seemed substantially leaner and the throttle didn’t hang when I let off so it seems promising. I’ll post back tonight with results.

So did you do a leakdown test?

Sent from my SM-G920W8 using Tapatalk

Cascade concrete · Mar 2, 2019

For all you Polaris patriot 850 guys with engine bogging I finally figured out the fix to this problem. After trying tones of clutching setups, spark plug gaps, new flash. And sled still is not fixed and here it is March now. I bought a new 2019 850 summit sp 175 and that fixed the problem. The best part no engine bog it’s amazing.

Matte Murder · Mar 3, 2019

Teth-Air said:
No there are 3 scenarios.

1. in break in mode. Please don't bother reporting anything until in Non-ethanol mode and at least over 10 hours on the clock.

2. fat around 4500 rpm and fluttering throttle seems to load it up more.

3. on the pipe and it falls on its face. This one may be a symptom of too light of clutching so don't bother posting unless you try heavier weights or lighter primary spring first

It is condition 2 that is a real problem that you cannot do much about unless you get the new map.

Really? No one can post unless they follow your rules? A sled should not run like crap in break in. On the Doos I can’t even tell except the oil usuage used to go way down and maybe a small adjustment in clutching. The older ETEC break in was 300 hard miles, that’s like 10 days of tree riding where we are. I’m not giving up 1/3 to half my riding so a manufacturer can sleep better. On my Alpha it just drank oil for a ride or two and backfired a couple times a day. I don’t even like having to break the track in on this thing lol. I want them close to optimum as soon as possible.
Why don’t you add a rule that Poo sociopaths don’t post anything unless it’s new information? I want to buy a 2020 Poo 174 and I’m trying to figure out if I can handle the risk of these problems carrying over. I’ll decypher the info on my own without you trying to censor it.
You think you know what the problems all are. You don’t. If it was that simple Polaris wouldn’t be in this situation.

Timbre · Mar 3, 2019

Cascade concrete said:
For all you Polaris patriot 850 guys with engine bogging I finally figured out the fix to this problem. After trying tones of clutching setups, spark plug gaps, new flash. And sled still is not fixed and here it is March now. I bought a new 2019 850 summit sp 175 and that fixed the problem. The best part no engine bog it’s amazing.

Know what would be more AMAZING??? If you posted your extreme satisfaction with your doo purchase over in the doo section

I am pretty sure if any of us wanted a summit, we would have already purchased one! But we don't . . . and didn't!

kanedog · Mar 3, 2019

Lotta anger in 850 Polaris section.
Why?

Sent from my SM-G920W8 using Tapatalk

nyrmk · Sep 4, 2019

Anyone else have their 850 reflashed and still have the bogging and hesitation issues? Mine was reflashed last February and continued having the same issues from the first hit of the throttle. I have yet to hear from Polaris on the next option to get the sled right.

klarkkentster · Jan 28, 2021

Bought mine at 115 miles - from 115 to 265 miles it fouled a plug every ride. At 265 it shelled a motor. It's in getting a short block and new injectors currently. In regards to fouling the plugs - my dealer stated one of the leading causes of fouling plugs is folks not getting the spark cap snapped on all the way. My sled is very difficult to get it snapped on that final notch. Has anyone experienced the same thing?

850 bogging

Well-known member

Active member

Well-known member

Well-known member

Well-known member

Well-known member

Undefeated mountain clutching champ of the world.

Well-known member

Well-known member

Undefeated mountain clutching champ of the world.

Well-known member

Similar threads