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Discussion Starter · #1 ·
which way should i turn the idle mix screws on my TM 38 on my 2000 polaris 500 xc sp to richen the mixture up? at idle its running about 900 degrees, and i cant get it to idle at 1400 rpms like it should, it will stay at 1400 rpms until i blip the throttle and then it drops down to 500 rpms and then i turn the air screw on the top of the carbs open then it goes back up to 1400 rpms but if i blip the throttle again it will drop again to 500 rpms why?

oh and my idle mix screws are 3 1/4 turns out, do i need a bigger pilot jet? thanks
 
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