Axys losing rpm’s randomly

jusrn192 · Sep 30, 2018

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 · Oct 1, 2018

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 · Oct 1, 2018

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

.

Wheel House Motorsports · Oct 1, 2018

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 · Oct 1, 2018

jusrn192 said:
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 · Oct 1, 2018

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

Sent from my iPhone using Tapatalk

adamg · Oct 10, 2018

Yeah try a new pipe exhaust temp sensor also.

Sage Crusher · Oct 11, 2018

adamg said:
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.

Search

Axys losing rpm’s randomly

jusrn192

Free Member

snobyrd

Well-known member

mountainhorse

Well-known member

Wheel House Motorsports

Well-known member

Sage Crusher

Well-known member

Ron Burgandy

Well-known member

adamg

Free Member

Sage Crusher

Well-known member

Similar threads