In order to optimize snowmobile clutch system efficiency, it is important to have a general understanding of the system's various components and how they work. The following report from Gates Corporation examines the three basic components of the clutch system - the primary or primary engine pulley, the secondary pulley and the belt.
Unlike an automotive transmission system, the belt and pulley mechanism on a snowmobile serves as both the clutch and the gear system. In making the transition from a starting gear ratio to the final "top gear," the snowmobile uses two belt pulleys which have the ability to open and close axially (sideways) so that a specially designed belt can ride in various positions in each pulley.
Fig. 1 Typical Clutch System
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