Polaris Virage TX 2000 Service Manual page 85

FUEL SYSTEM/CARBURETION
Carburetor Adjustment and Service
Low Speed Mixture Screw Adjustment - Keihin
NOTE: Synchronize carburetors and adjust idle speed precisely with a tachometer (in the water) before adjusting
low speed mixture screws.
4. Turn each low speed screw in clockwise to lightly
seat, then back each out the specified number of
turns. See charts at the beginning of this section.
NOTE: This is a base setting only. Final 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 a smooth idle and
good throttle response is obtained.
IMPORTANT: Prior to performing any adjustments to car
buretors check the following:
• Verify that no water is present in the fuel system. Check
the water trap for presence of water.
• Verify all fuel and vent lines are routed and secured
properly.
• Verify all seal and gaskets are in good condition (no air
leaks present).
• Check engine compression (see engine section).
• Verify proper fuel flow (i.e. fuel flow through shut off
valve passages, tank, lines, and filters).
• Synchronize carburetors; inspect throttle plates (butter
fly) for damage.
3/00 3.22 Polaris Sales Inc.