the pre-season checkup and maintenance, you can follow
these suggestions to make sure your snowmobile runs cleaner
high-grade oil and gasoline, which burn cleaner.
the engine for your altitude, including the proper carburetor
jet setting, which improves fuel efficiency and reduces
opening and closing the throttle continuously, which causes
inefficient fuel burning and increases emissions and noise
the spark plugs at least once during the season to ensure
efficient fuel burning.
tamper with your exhaust pipes as that causes the machine
to exceed legal noise limits.