From another forum last year... With these guys it seamed they didn't maintain the sled properly. With one exception... a power valve. Are you running a new Polaris Axys specific belt? They are different belts than the pro and you might want to double check that you didn't end up with the wrong one as your replacement. If you're running a new correct belt next I'd check the power valves since you've already serviced the clutches. Did you check the weight bushings on the primary? What oil are you running? I switched to the Race a few years ago and have noticed much better results.
"As you guys may know I was one of the guys that got to go to Minnesota and test drive the Axys along with other guys here on HCS. Well, I met some of the Polaris guys over there and stayed in touch. They were watching the threads about the FADE issues on here. They flew over some engineers to try to figure out the problem. I was contacted and asked it I would lend them my sled as well as FIXAHONDA (my brother) and my cousin Dan. I didn't have the fade problem much, they did. There was a total of 7 sleds they tested in Oquossoc, Maine. I was sent a copy of the results and and given the OK to post it:
They datalogged all sleds and found no issues with tuning. None had signs of knock retard at anytime.
They inspected all engines for wear and found none on any of them. All 7 motors were in perfect condition, mine had 3500 miles.
The most common factor among all of them were belt wear. The sleds were fitted with new belts, broken in and all of them performed at the correct operating RPMs.
They did find one sled with exhaust valve issues and replaced them as well as the controller. This was one of the main causes along with the belt on that sled.
Another sled had abnormal wear on the secondary, they replaced it and it fixed the problem on that sled.
In Maine where they tested is at an elevation of 1600ft and it was warm (48 deg) so some of the sleds did have a lazy backshift in those conditions. That's the only time mine struggled to get up to 8250. Polaris is going to release an update on clutching but I believe it will be 10-64 weights in higher elevations in warmer temps. They tested on Rangeley Lake and it's a big lake and flat so WOT testing was not a problem.
My sled had worn hyfax and they replaced them, they said they picked up 5 mph. I guess track tension and hyfax are important on these sleds.
As a result of the testing Polaris will release the info to dealers to help fix problem sleds.
They had our sleds for the whole week. At the end of the testing they got all 7 sleds to turn 8250 rpm's all the time.
Basically the engineers at Polaris said it was a combination of issues that were affecting rpm. The belts are only good for 1000-1500 miles of hard riding and the primary clutches are good for maybe 2500 miles before needing servicing. One of the primary clutches was taken back to Minnesota because of "irregular" wear.
Interestingly Oquossoc Marine had no reports of sleds with rpm fade before Polaris showed up.
Here's what I think: My first belt lasted 2400 miles before I did have rpm fade, I changed the belt right there on the trail, broke it in for 30 miles and then my fade issues were gone. I had 2014 ETEC 800 last year and had the same problems except I could only get 1000 miles out of a belt before rpm fade issues. My 2012 AC F1100T didn't required belt inspection because it would blow it to bits before 1000 miles. I rode with my buddy a lot with his ZR8000RR this winter and his sled would drop down to 7400 rpms randomly on top end runs. I guess this is the nature of 150+ motors. My sled has had no issues at all and even my 14 Doo stuck the valves at 2200 miles.
I know there's endless threads on here about issues but hat's off to Polaris for aggressively pursuing the problems. They watch this forum and listen. I ride my sled very hard and demand a lot. Overall I'm still happy with the sled and would recommend it. If you think the grass is greener at the Yellow camp, talk to my brother LENNSTANG on there about the living HELL he went through with 2 of the 3 Etec 800's he owned. As you guys can see, I'm not brand loyal, I owned a Doo and Cat before this. If I'm not happy I'll sell the sled and move on. I'm going to stick with the Axys because at the end of the day it still performed better for me than the competition."
maybe they found the problem.
