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Arctic Cat: Powder Special and older 2000 and older, all models in the Powder Special chassis and older chassis models
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Old 11-16-2017, 03:47 PM
nolaninthebox nolaninthebox is offline
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Default 1981 jag 4000 L/T jetting and idol.

I just got my dads 1981 arctic cat jag 4000 l/t. I live in Denver and the snowmobile came from Illinois. I'm trying to get it running properly, but I am having issues getting it to idle correctly. I was hoping to find some advice on what size main jet I should use and also any other input that may improve it's idling/performance. Thanks for any help. I'm currently backed out 3/4 of a turn on the idling jet if that helps.
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Old 11-17-2017, 11:01 AM
motorheadmike motorheadmike is offline
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Did the machine run good at low elevation? What size jets are in the carbs now? Most likely the pilot jets will need to be replaced with smaller, possibly the main/needle will need changed/adjusted.
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idol, jag, jet

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