850 bogging

Teth-Air · Feb 11, 2019

Andyman said:
In my mind, the spark is stronger with smaller gap. It takes less energy to make the spark with smaller gap.

In other way, it needs richer air/fuel mixture to kill the spark when the gap is smaller.

Thats why i wanted to try reducing the gap, because we cant lean the air/fuel mixture, or make the ignition stronger at the moment.

Rode this weekend and switched back to stock plugs and sled ran terrible. Went back to the hotter plugs and all is good. Wish I remembered the feeler gauge and wish it was a warmer weekend and I would have tried playing with the gap. Maybe this weekend. On another note I had a customer call me this morning and he mentioned that Polaris has indeed released a new map. I cannot confirm if this is true but maybe a dealer on here can respond?

greasemonkey3406 · Feb 11, 2019

Teth-Air said:
Rode this weekend and switched back to stock plugs and sled ran terrible. Went back to the hotter plugs and all is good. Wish I remembered the feeler gauge and wish it was a warmer weekend and I would have tried playing with the gap. Maybe this weekend. On another note I had a customer call me this morning and he mentioned that Polaris has indeed released a new map. I cannot confirm if this is true but maybe a dealer on here can respond?

Yes its true. I have mine scheduled to get done on Friday.

aksledjunkie · Feb 11, 2019

goridedoo said:
Drill and tap new holes in head so the plugs are closer together

HAHAHAHA I just died!!

aksledjunkie · Feb 11, 2019

Been gapping our plugs up here since 2016 when we were having issues blowing out spark. Usually gap to .018 for our boosted setups.

off trail mike · Feb 11, 2019

Sled at dealer with recoil issue and he put the new map in it as well.

With 30-40cm's coming Wednesday, and a scheduled tower inspection on Thursday....going to get a test day in too!!!

Will report back as soon as I'm back.

OTM

FatDogX · Feb 11, 2019

off trail mike said:
Sled at dealer with recoil issue and he put the new map in it as well.

With 30-40cm's coming Wednesday, and a scheduled tower inspection on Thursday....going to get a test day in too!!!

Will report back as soon as I'm back.

OTM

How about some more info on the "new Map" or what have you been told ?

I haven't had a chance to swing over to the dealer lately.

pekka71 · Feb 12, 2019

First test run new map!
No more boggins!!!!

Havnt Done anything to the sparks, just new map and it it is a new motor, happy now, maybe lost little torque in the middel (can be wrong here)

But onley 6,5h on the breakin, 28,5 h on the display

m1kflyingtiger · Feb 12, 2019

No clutching changes to pull the same top rpm?

pekka71 · Feb 12, 2019

just a test run, tomorrow it will be a longer run, report after that

dragona1 · Feb 12, 2019

Mine runs good too with the new tune. Thanks polaris.

greasemonkey3406 · Feb 12, 2019

dragona1 said:
Mine runs good too with the new tune. Thanks polaris.

Notice any power loss? Sometimes a reflash makes me nervous lol.

dragona1 · Feb 12, 2019

greasemonkey3406 said:
Notice any power loss? Sometimes a reflash makes me nervous lol.

Not by the seat of the pants. Runs exactly like it did before the tune. Just no stumble or bog. Was your sled acting up?

nyrmk · Feb 12, 2019

Glad to hear about the reflash, Ill be calling my dealer in the morning to see when they can do mine. Thanks for the updates.

pekka71 · Feb 13, 2019

today i have a run for 80 km, it bogged twice, and now it over revs 8500-maybe 8600 sea lvl, befor the mapping 8400 rpm

got the "DET" error code, restart and all was good

The rpm hold is worse after the mapping, now you have to break harder to stop pulling

Overall it works better, but still isus, going to set the gap tonigth to .5mm on the sparkplugs

i have stock clutch 72g here in sweden

tdblakes · Feb 13, 2019

pekka71 said:
today i have a run for 80 km, it bogged twice, and now it over revs 8500-maybe 8600 sea lvl, befor the mapping 8400 rpm

got the "DET" error code, restart and all was good

The rpm hold is worse after the mapping, now you have to break harder to stop pulling

Overall it works better, but still isus, going to set the gap tonigth to .5mm on the sparkplugs

i have stock clutch 72g here in sweden

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

Jaynelson · Feb 13, 2019

Ya I would guess you are hitting the rev limiter with too light of weights. That could be why you saw det and could even be your bog.

maurfello · Feb 13, 2019

When people are experiencing bogg, what are the snow conditions? I have experienced bogg but only in 2 + feet of blower pow. Truly interested as I have an 850 with 350 miles and started to get the bogg at 250 miles.... The last hundred as I stated before was in deep blower pow. Thanks in advance.

FatDogX · Feb 13, 2019

Updated fuel map installed and ready to roll.

Heading out to West Yellowstone tomorrow, so we'll see how it does.

Scott · Feb 13, 2019

FatDogX said:
Updated fuel map installed and ready to roll.

Heading out to West Yellowstone tomorrow, so we'll see how it does.

I heard it was out.
I'll await your report.

MTsled3 · Feb 14, 2019

Jaynelson said:
Ya I would guess you are hitting the rev limiter with too light of weights. That could be why you saw det and could even be your bog.

I've been thinking that could be the cause of some of the (top end/ acceleration) bogs people are describing. Especially people that experience it after break-in mode, it could be from the sled "waking up" and then the weights that worked well in break-in mode are too light for the added power.

My 800 will do this at my house at 4500', it falls on its face of you punch it hard, basically the engine pre-emptively cutting out to prevent over-rev since there isn't enough load on the engine. But once I get to about 7500' it won't do it at all since that's what I'm clutched for.

850 bogging

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