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· Registered
2001 Polaris RMK 151" /// 2002 Polaris RMK 159"
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18 Posts
Discussion Starter · #1 ·
I’m working on an 03 mountain max, hasn’t been run in a few years, got the carbs cleaned up, replaced plugs and I’ve got good fuel in there. I’ve checked spark and I’ve got heet in the tank to account for any bad gas or water still in the lines.
It starts up easy but won’t run smooth, it doesn’t die on me, just backfires a ton and when I give it gas it dies. I’ll include a video
63397890422__C16F1741-9919-4CD1-9E72-B2F60360BADD.MOV

drive.google.com
drive.google.com
 

· Sled Of The Month Judge
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2,872 Posts
That's an electrical issue! T.O.R.S (Throttle Over-Ride System) is a rev limiter that limits RPM to around 3,000 so the sled won't go for a ghost ride if the throttle is stuck open. And that is exactly what sounds like is happening on your sled.

There are two switches: one on the carb, and one on the throttle. If the switch on the carb opens when the throttle switch isn't being pressed, it will activate. It will also activate if the RPM is higher than 3,000 RPM at idle.

First thing, it's idling too high at the beginning and triggering it. Idle should be set to 1,500 RPM, so get that settled in first.

Next, the throttle switch is probably bad, so it isn't "pressing" when you use the throttle, causing T.O.R.S. to activate. You can check it by testing for continuity with a multimeter at a plug under the handlebar cover.

Finally, you can bypass the system by unplugging the switch on the carb, and plugging in the leads from the wiring harness together. This causes the system to always see the throttle as closed, and not intervene (though it probably will for high idle still) Keep in mind while it's bypassed though, if the throttle is stuck open, it'll take off on its own!
 
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