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I have a 98 MXZ 500 ,a Formula 500 SL , Polaris 500, and 340
The Formula and two polaris sleds Idle at about 2000 RPMs for the first few minutes then drop to 1600 when they get warm.
The MXZ Just stays at 2000. I slowed it down by backing off the idle screws. Is this common or could I have a carb problem. I drained the carbs and checked the bowls and big jets and they were all spotless.
Thanks, Don


Who ever dies with the most toys wins.
 

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If your sled is equiped with a choke, i would see if it is stuck open on the carb end. I think yours has a primer doesn't it......?

Just a thought.
 

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Yea, mine has a primer. I just got back from the local dealership and the head mech. said I probably have a bad DPM temp sensor. It changes the timing till the engine is warm.
I could have a loose wire going to the sensor, I`ll check that 1st.

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The needle jets purpose is to keep a constant level of fuel in the bowl. The main jet which you checked is only used at mid to high rpms. The pilot jet is the one you should check, that handles all the fuel flow at low rpms and idle, BUT if its idling to high, its probably not a jet, unless the holes in the pilot jets got bigger somehow. I would think that your mechanic is right.

Need some darn snow people.
 
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