2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 158Get this manual

2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 158

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FUEL SYSTEMCARBURETION
Inlet Pipe

MAIN SYSTEM
As throttle valve (1) is opened, engine speed rises, and this increases negative pressure in the venturiConsequently the vacuum s