Have a 2016 Axys 800 163. I have an SLP muffler on a stock pipe, and a Kurts Gear down kit on it. Normally run 10-64's around Revy/Golden and pull 8150 +/- 150 all the time. Lately have noticed that after a good pull where your WFO for a bigger hill or just playing around with the flipper taped to the bars for a bit (30 - 40 seconds maybe) the rpms dont come down as fast as normal. Never thrown a code or anything and always use 91 fuel. Next trip out I will try switching to ethanol mode, that should richen it up a bit correct?
Axys maybe Lean?
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roadlinur113
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Someone with more Polaris know how than me can answer best but I believe the ethanol switch is there to retard ignition so as to prevent detonation or engine knock. I am unsure if it also richens up the fuel/air mixture?
dragonweld28
Supporting Vendor
Im not sure about timing, but, it does add 5% more fuel across the RPM curve. Biggest thing is to make sure your running fuel with no ethanol. Shell 91 has no ethanol. If you run esso, or metro 91 there is up to 10% ethanol in the fuel.
roadlinur113
Active VIP Member
It used to be 91 octane from Shell, Esso, and Co op were the 3 stations in alberta that were ethanol free in their premium blends.....unless they have changed recently. Petrocan 94 may contain ethanol if you check out their website.
Ethanol-free gas stations in the U.S. and Canada
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ABMax24
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Can you explain a little more when you say rpms don't come down as fast? Do you mean it doesn't go down to idle rpm as fast?
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Can you explain a little more when you say rpms don't come down as fast? Do you mean it doesn't go down to idle rpm as fast?
Yes, it doesnt come down to an idle as fast as it normally does, almost like the throttle is slowly shutting. it only happens when your really working the sled.
Yes, it doesnt come down to an idle as fast as it normally does, almost like the throttle is slowly shutting. it only happens when your really working the sled.
ABMax24
Active VIP Member
My pro has done that since new, I doubt it has to do with fuel quality, if anything I think it's because the idle may be set slightly to high on the throttle bodies making it slow to idle down. And when mine is hot the engine seems to fire everytime instead of getting the typical 2stroke misfire which would also lead to a higher idle rpm.
ABMax24
Active VIP Member
Have you ever seen a 2 stroke that fires every single time it is supposed to at idle?
Honestly I'm not good enough with IC engines to even tell. Sometimes my Polaris 800s start up at a very low idle, gauge doesn't come on, and buddies tell me it is running on one cylinder, I would have never guessed that though.
I will say though, I think the etec engines are pretty impressive at idle.
I will say though, I think the etec engines are pretty impressive at idle.
sledhead9825
Active VIP Member
Yes I have
ktmsx350f
Active VIP Member
Ethenol reqires a richer fuel map the ethonal mode adds fuel. I can't see it pulling timing ethonal fuels have more resistance to knock then 91 that's why automotive turbo guys love e85 make way more power. 2 strokes do not missfire at ide if they were to miss they would load up or foul plugs possible backfire. If an engine is missing it's not running property. Depending on how long it takes to idle down this may be normal or you may have a slight vacuum leak, a throttle body hanging up, thtottle cable to tight, or snow holing it out. My Axys is bad if I'm riding deep snow i get build up in the throttle block and it is to the point i have cruz controle sometimes..
Teth-Air
Active VIP Member
Are you sure there is no snow stuck under the flipper. We saw this the other day when it was deep. Also I used 20% more fuel compared to buddies machine when in ethanol mode. Previous day we were within pennies at the pump.
MolsonM8
New member
Is that 5% more than stock across the whole rpm curve? If the fuel contains ethanol (Petro/Husky 94 with ~10% ethanol) the sled must be ran in the ethanol mode so that it wont run lean?
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