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Over this past weekend my 97 vmax sx started idling at around 3.5-4k rpm. I am new to snowmobiling and looking for advice or thoughts on what the issues may be. When riding it runs good as long as its not in deep powder. Any ideas on what the problem may be would be greatly appreciated.

Thanks,
Andrew
 

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Often, a high idle is an indication of a lean condition, sometimes caused by a leaky seal behind the primary clutch or leaks in the carb to engine rubber adapters. Check those by spraying starter fluid around the area with the engine idling. If you get a change in idle, you have a leak. If so, get it fixed, that leak can cause the air/fuel ratio to lean out so much that you melt holes in the pistons.

Secondary to those issues, you may have some crud in the pilot jet circut of the carbs. Cleaning carbs usually solves that. Have you tried adjusting the air screws? Go in 1/8 of a turn on each carb and check idle. If you bottom the screws with no change in performance, your fuel circuits to the pilot jets or the pilot jets are clogged.
 
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