Axys losing rpm’s randomly

[jusrn192]

Axys losing rpm’s randomly

I have a 2016 Pro RmK 800 with around 1,200 miles on it. Was on a week trip in Montana and towards the end of my trip the sled started dropping rpms randomly. At first I thought it was air intake as it was a deep day but it continued to happen back in Oregon. Anytime I do a steep climb I lose rpm’s. Usually when fully pinned. It cuts out then comes right back. Not fun when your in the middle of your climb. Had a local shop look at it and they said everything looks fine. Any thoughts?

 

[snobyrd]

Check your power valve bushings, mine did the same, ended up being worn out bushings inside the housing, bad motor mounts also cause inconsistent rs and also try a new belt.

 

[mountainhorse]

I think that Murph has posted up some good threads/posts on this...???

Exhaust Valves, motor mounts, clutching.

Maybe he can chime in here and TTT those threads.... please Murph


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[Wheel House Motorsports]

Your mentioning erradic RPM drop and recovery mid climb? Motor mounts/clutching etc usually results in aggressive fade/heat soak and general inability to hit RPM.

Random RPM drop/recovery would more likely be power valve system related. I would check relays/terminals for the power valves. If you are randomly loosing connectivity and the power valves are closing and opening again that will make it suddenly bog/dive below 7k and then quickly recover.

 

[Sage Crusher]

lose rpm’s. Usually when fully pinned. It cuts out then comes right back. Not fun when your in the middle of your climb. Had a local shop look at it and they said everything looks fine. Any thoughts?

Sounds like as Wheel House has said- I would focus on the relays across your brace that is horizontal above you pipe. Not only check for corrosion ( and you can search that easily) but it's time to replace both of them...They are the heart of your power valves.

 

[Ron Burgandy]

welcome to the party... mine ended up being the pipe sensor. does anyone know if the 18’s have had the same issues?


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[adamg]

Yeah try a new pipe exhaust temp sensor also.

 

[Sage Crusher]

Yeah try a new pipe exhaust temp sensor also.

You can use a pipe sensor off the older pros also.. I have done a few swaps troubleshooting things and found the pipe sensor swap works. I used one off a 2014 known to be good, and still in my 16 Axys- connection are the same.