2000 Polaris Virage TX, SLX, Pro 1200, Genesis, Genesis FFI Personal Watercraft Service Manual, Page 85Get this manual
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FUEL SYSTEMCARBURETION Carburetor Adjustment and Service
Low Speed Mixture Screw AdjustmentKeihin
NOTE: Synchronize carburetors and adjust idle speed precisely with tachometer (in the water) before adjusting low speed mixture screwsTurn each low speed screw in clockwise to lightly seat, then back each out the specified number of turnsSee charts at the beginning of this sectionNOTE: This is base setting onlyFinal adjustment must be made by warming the engine to operating temperature, and adjusting low speed screws in (to lean) or out (to richen) mixture until smooth idle and good throttle response is obtained