Bog and low rpm issues.

[jdtech65]

I have a 16 Axys I bought used this summer. It has 600 miles on it and is a 163 2.6" track. Out riding in Buffalo Pass around 9,000- 10,000 feet.

The first issue is it didn't want to idle very well. From reading it sounds like a tps adjustment. Which sounds simple enough to fix that.

The second issue I have is a bog around 5500-6000 Rpms. it seemed like it was the most noticeable on the trail ride out in the mornings. Not as noticeable while riding but then again I'm not keeping it steady in that rpm range. And it wasn't as noticeable on the trail ride in. Gonna try cleaning the exhaust valves when I get back home.

I also was only hitting around 7900 Rpms with 10-60 epi belly buster weights. All other clutching is stock. I switched to 10-58 epi belly buster weights and saw a little increase to 8000 rpm but that was also 2 feet of more snow between those two Days.

While looking over the sled I did see that some of the wires going to the relays on the cross member were rubbing on the GPS bracket.
The idle issue seems easy to fix. But I would really like to eliminate that bog and see my Rpms more around that 8200 rpm range. Looking for some recommendations and insight. Thanks.

 

[icr]

Try fresh gas and plugs. Check the reeds.

 

[jdtech65]

I've rode for 3 days in this trip. I only had less than 1/4 tank of old fuel when I started so it should be all good fuel now. Also had new plugs before this trip.
I can check the reeds when I set the tps.

 

[NoSoup4U]

I was having the same bog issue at 5500-6000 RPM on my 2017. I was running a Bikeman pipe and SLP can. Took the SLP can off and put the stock can back on and the bog disappeared.

This combo of the Bikeman pipe and SLP can worked well on my 2016, but my 2017 didn't like it. Different machines react differently to the same mods. If your running an aftermarket can put the stock one back on and I'll bet the bog goes away.

 

[SRXSRULE]

Check the throttle cable free play, wont effect your WOT rpm but can cause the bog issue.
Also, whats the belt situation? If it still has the original belt on it, its time for a new one, or at the very least adjusting the secondary.
Your signature says it has an HPS can on it.... Not sure if thats and issue or not because they were very late to get cans out last year for the 16 and not many people ran them. You might trying swapping it with a stock can, or just swapping to a different aftermarket can. Do you have any other axys sleds in your group you could switch with? We have even done this out riding before and seen the "issues" fixed on the problem sled and move to the sled that was running fine. Worth a try.

You should be able to pull way more then 58G at 9-10,000. 60-62's is what you should be able to run and still hit 82-8300. Eric

 

[sms]

I have a 16 axys and had the same issues up at Buffalo Pass. 160 miles with SLP pipe and can. Running Struthes clutch kit with Dalton weights at 65 grams. I was hitting the right rpm's but had a huge bog in the beginning. The dealership got me in adjusted the TPS sensor. Flashed the ECU and applied some dielectric grease in the connectors. Rode like a charm after that. No bog what so ever. Good luck

 

[jdtech65]

Check the throttle cable free play, wont effect your WOT rpm but can cause the bog issue.
Also, whats the belt situation? If it still has the original belt on it, its time for a new one, or at the very least adjusting the secondary.
Your signature says it has an HPS can on it.... Not sure if thats and issue or not because they were very late to get cans out last year for the 16 and not many people ran them. You might trying swapping it with a stock can, or just swapping to a different aftermarket can. Do you have any other axys sleds in your group you could switch with? We have even done this out riding before and seen the "issues" fixed on the problem sled and move to the sled that was running fine. Worth a try.

You should be able to pull way more then 58G at 9-10,000. 60-62's is what you should be able to run and still hit 82-8300. Eric

I did adjust the throttle cable free play. I put a new belt on when I swapped out the weights after the first day of riding. I was the only Axys in the group this trip so I couldn't swap cans. If I can't figure anything else out before my next trip I will at least take the stock can along next trip.

 

[dexter]

You may have taken out a reed or scuffed a piston running that crap fuel your first ride. You should never run any of the old fuel. Topping up with fresh fuel just don't cut it.

 

[jdtech65]

I was watching my go pro videos and focused on the display. The second day I did see some 8200-8250 rpm on the display in the videos. The third day there wasn't one video that the display wasn't covered in snow. So maybe I don't have a real issue with peak rpm. Just the poor idle and intermittent bog which is most likely the tps.

 

[nater24]

I'm on a 2016 axys and installed a BD sidekick turbo last year. We didn't have any issues last year. Last weekend we got 3 feet of new powder on 2 feet of base so it was a WOT day. The problem was my sled was bogging consistently everytime I hit 7500 RPMs. I couldn't get it over 7500. It would bog back down to 6500 and then kick back in but when it hit 7500 it would bog back down. We mix a little race gas and I had about 93 octane in the tank. I started thinking that maybe my octane was too high but not sure. Then after talking with BD we figured that it might be the exhaust valve being gummed up. So today I got all the mixed fuel out of the tank (just in case that was part of the problem) and put 5 gallons of 91 non ethanol pump gas in and added 5 ounces of seafoam to try to clean up any potential carbon build up. I went up for a few hours today and it bogged just a little a few times and then cleaned up and ran strong the rest of the time. I'm not 100% sure what the actual problem was but I would guess it was the exhaust valves being gummed up. So if you can, try to find some seafoam and see if that works. Also, I called my polaris dealer about what it takes to clean the exhaust valve and he said don't try to do it yourself. You have to have a special tool to re-calibrate it when you put it back in. Not sure how much of that is. I want to clean mine and would rather not spend the money to have the dealer do it if it's something pretty simple to do. Let me know what you end up doing.

Good luck

 

[sumtinwong]

their is a post somewhere here about cleaning the valves. I think you can take them out and clean them just don't play with the cable

 

[akpowderhound]

I'm on a 2016 axys and installed a BD sidekick turbo last year. We didn't have any issues last year. Last weekend we got 3 feet of new powder on 2 feet of base so it was a WOT day. The problem was my sled was bogging consistently everytime I hit 7500 RPMs. I couldn't get it over 7500. It would bog back down to 6500 and then kick back in but when it hit 7500 it would bog back down. We mix a little race gas and I had about 93 octane in the tank. I started thinking that maybe my octane was too high but not sure. Then after talking with BD we figured that it might be the exhaust valve being gummed up. So today I got all the mixed fuel out of the tank (just in case that was part of the problem) and put 5 gallons of 91 non ethanol pump gas in and added 5 ounces of seafoam to try to clean up any potential carbon build up. I went up for a few hours today and it bogged just a little a few times and then cleaned up and ran strong the rest of the time. I'm not 100% sure what the actual problem was but I would guess it was the exhaust valves being gummed up. So if you can, try to find some seafoam and see if that works. Also, I called my polaris dealer about what it takes to clean the exhaust valve and he said don't try to do it yourself. You have to have a special tool to re-calibrate it when you put it back in. Not sure how much of that is. I want to clean mine and would rather not spend the money to have the dealer do it if it's something pretty simple to do. Let me know what you end up doing.

Good luck

Sounds like your dealership is looking for a lil more of your money. Cleaning the exhaust valves is not difficult.
I don't believe you un-gummed your exhaust valves with sea foam.
My guess would be fuel quality, for your tune.
Like the above post said.
Don't mess with the cables on the exhaust valves but clean them up in the sled.
Remove the steering post bolts and tilt it out of the way.
Watch the springs on the valves as they are under compression.
Find the topic on cleaning them. It's something you should know how to do, if you are taking it into the back country.
Good luck