Spitting and Sputtering (NEED HELP!)

[speedy75]

I was doing some riding last weekend doing some off trail/powder riding and when I went back on the trail and I throttle the sled up to 6000 rpm or more the sled would spit and sputter really bad, but when I let off and the rpms dropped (below 6000 rpm) it ran okay. We were all done riding for the day, so I brought the sled home put some heat in the garage to melt some of the snow. Then I took the sled out for a small ride in the backyard (10 min or so) it seemed to run fine so I thought maybe I sucked in some snow through the K & N filters and I needed to melt some of the snow or ice.
Then today I took some of the plastics off just to clean the sled, and I also put die electric grease on the coils & sparkplug boots and when I was done I started it up and rode it a little bit and it started spitting and sputtering again, this time it was worse after a little bit the sled wouldn't even move so I shut it off and change the plugs and that seemed to help, it ran fine. FYI (I just put a brand new set of plugs CR10EK in at the beginning of the season and I have only put on 400 miles or so on those plugs, they shouldn't be bad nor did they look bad) So I did a search here on TY for spitting and sputtering, and a lot of people recommended clean the pilots jets in the carbs, so I took them out and cleaned them though they didn't look bad at all, the sled only has 2000 miles on it. Do you have any suggestions of what the problem maybe? Could it be bad gas(wouldn't think so because the friends I went with got gas at the same place and didn't have any problems)? Could there is an electrical problem, since it seems to be intermitant? Being new to these sleds I guess I am running out of ideas.

Any help you can provide would be highly appreciated!

Thanks!

 

[Bullet69]

Could be the gas. I filled up once with a group of guys and my sled was the only one to spit and sputter.It was an Arctic Cat though, Not a Yamaha. Put some fresh gas in it. If that doesn't work, It's probably from getting the snow in thru the k&n filters. Quite a few people I know would tell you that those cones look cool, But to take them off and throw them away and put the airbox back on.

 

[maim]

or put the pre filter on the k+n to take care of the snow ingestion.

 

[speedy75]

I all ready have pre-filter on the K & Ns.

 

[Think_Again]

Mine spit and sputtered also, but the bigger problem was a hesitation.. look here..

http://www.ty4stroke.com/viewtopic.php?t=39025&start=15

 

[speedy75]

Did you get your hesitation problem fixed? If so what was the problem?

 

[LazyBastard]

Those are colder plugs. Could be fouling.

Also could be the TORS switch on the handle bar. Normally, it activates at a lower RPM, but if there is water in the switch, the circuit could be breaking beyond a particular throttle position.

 

[otis]

Check the rubber intake boots which attach the carbs to the intake manifold. Mine are torn and it ran the same way.

Otis

 

[speedy75]

I will check the TORS and the carb boots out tonight.
Thanks!

 

[Think_Again]

No my problem isn't fixed yet. I have a good friend that is looking at it for me. I think it is electrical... I've checked everything else.

 

[mmmkokanee]

probably freezing up...i taped over the front hood vents and in the nose and leave the carb heat on 1/2 way or more if there's any powder (i do have pre filters on). That fixed the prob...
It did seem like an electrical prob when it happened, but it hasn't done it since.

 

[ogre]

Notice my 05 RX1ER has a hesitation. Carbs were icing up. Stock air box does not fit properly near #4 carb allowing snow in.