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is carb mixture adjustable?

2842 Views 7 Replies 4 Participants Last post by  atv_nut
Is the carb on an 06 4x4 500 adjustable?

I keep setting idle speed, but it drops from 1300 to 950 when the fan kicks on.

Also, it will crank right up without any choke. This makes me think it's running a little rich.
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<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">As for cranking without the choke as long as you are not fouling plugs let her run.<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
That only means the pilot jet is alittle rich, but the pilot jet only comes into play from idle to 1/8th throttle and has no affect on the other 7/8ths of the throttle you have. But I have heard and seen where most atv's and utv's come from the factory alittle rich so you may be able to lean that up too by changing the needle settings or the main jet. Always take a plug reading to see what your motor is doing before changing things. You wouldn't want to lean it out to much and burn or lock the motor up. It's best to leave it like it came from the factory unless you know what your doing, atleast that way you will be safe and not trash the motor. If you take the time and play with the jetting and get it right you will notice an improvement in power and performance.
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Sorry I had forgotten Mine done the exact same thing after 5 or so hours of running time. I finally figured out the throttle cable needed adjusting after I messed with the idle screw on the carb and it had no afect either way. Once I figured this out and adjusted the slack out of the cable she has run fine since then.
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