2010 RMK 800 occasional backfire

[jkyle500]

Last weekend I took my 2010 RMK 800 out for a drive. It was quite foggy out (live in the flatland, field driving), so I was fairly easy on the throttle compared to normal, and the sled backfired a couple times later in the ride. I attributed it to fueling issues given that normal I don't ride with that little throttle, and thought it'd clean itself out after some normal, throttle heavy riding.

The next day I took it out, and it still backfired a couple times throughout the day. It seemed random when it would, once was while moving the sled quite slowly to turn it around, the next time would be a half second into a WOT blast where it would fall on it's face for a second (like it lost spark completely), backfire, then continue on. The next long pull at full throttle would be fine. It only happened maybe 4-5 times, but up till now I've never had an issue so it makes me nervous, especially given the reputation the motor has. That said, I installed the fix kit last year, and ran it all last year.

I pulled the plugs and they look OK to me, tan to whitish tan in color. Could a spark plug be fouled and still look normal? Is there something else I can check by myself before I bring it into the dealership?

 

[proxguyassaulted]

Spark plug cap.

 

[diamonddave]

Spark plug cap.

And/or bad gas. Drain all fuel and start with some new ethanol free fuel....

 

[SaskRMK]

with the new ethanol free fuel ensure you have the non ethanol resistor installed.

goodluck!

 

[instigator]

800

Throttle safety switch. Check gap between throttle block and throttle lever. If too much it will back fire.

 

[jkyle500]

Sled died on me last run out. Just heard from the mechanic, apparently it was a part of my recoil that was grabbing occasionally (which is why it was random when it would sputter), and when it finally really grabbed on it took the stator out with it Thanks for the advice nonetheless.