Mid range sputtering on friends stock Axys

Prayn4snow · Mar 15, 2018

I’m up at Togwotee for a couple weeks and my friend Lefty has two sleds. His stock sled (just a can) is sputtering “occasionally” in the mid range. Good compression, Good plugs, I just changed his relays with some new ones I had. He has a new exhaust cable (last one broke). The dealer reset the valves and cleaned them. I’m on vacation riding without my race trailer and tools. Yes I feel naked without my tools. So I’m limited on what I can check and do up here. It runs great at low end and top end.
Exhaust valve problem? Dealer had digital wrench on it with no codes.

Snopro_69 · Mar 15, 2018

Read a few guys here now throwing the stock can back on and the issue is going away. . Maybe some cans are wearing out and changing back pressure? Or how many miles on with can running fine? Just an idea. . That would be up high on my to try list

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greasemonkey3406 · Mar 15, 2018

I had an issue with mine last year with the sled running weird and not pulling rpm. Turned out the pipe wasn't sealing properly and wasn't building enough heat. I kept putting copper rtv on it until the end of the season. This season I changed the donuts, put on new springs and more rtv and have not had a problem since. Tell Joe I said hi!

Sheetmetalfab · Mar 15, 2018

Prayn4snow said:
I’m up at Togwotee for a couple weeks and my friend Lefty has two sleds. His stock sled (just a can) is sputtering “occasionally” in the mid range. Good compression, Good plugs, I just changed his relays with some new ones I had. He has a new exhaust cable (last one broke). The dealer reset the valves and cleaned them. I’m on vacation riding without my race trailer and tools. Yes I feel naked without my tools. So I’m limited on what I can check and do up here. It runs great at low end and top end.
Exhaust valve problem? Dealer had digital wrench on it with no codes.

Throttle safety switch?
And or loose throttle cable?

Polaris tether? Unplug it?

150+ or nothin · Mar 15, 2018

I also had an exhaust leak between my y-pipe and pipe that showed up as similar symptoms as you are describing. When you mess with the exhaust (like installing a can) you have to be very careful not to nick the gaskets. Especially any on-off throttle mid range over bumps or when the sled was laid over the loss of power showed up. Replaced exhaust donut and the problem went away. Good luck.

Prayn4snow · Mar 16, 2018

Thanks for all the options. Runs the same with the stock can. Donut is good. RTV on the joints. He does have his tss bypassed because he runs a custom throttle and brake on the right grip. Tonight we found the wire harness was worn near the coolant line. Liquid electric tape and rubber hose over it temporarily. Runs excellent except from 5850 to 6050rpm. Could it be One of the stages of the exhaust valve??

Indy_500 · Mar 16, 2018

Valves hanging up? I cleaned mine 3 times within 1300 miles and theyre always very dirty

Perk · Mar 17, 2018

Would be interesting to use an analog meter and do a sweep on test on the tps.

TRS · Mar 17, 2018

Try a can of sea foam.

TRS · Mar 17, 2018

Try a can of sea foam.

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Mid range sputtering on friends stock Axys

Prayn4snow

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Snopro_69

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greasemonkey3406

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Sheetmetalfab

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150+ or nothin

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Prayn4snow

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Indy_500

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Perk

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TRS

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TRS

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