Polaris 2003 Pro X Service Manual page 119

Mikuni TM-38 / TM-40 Carburetor Service
3. Place carburetor in an inverted position.
4. Connect pressure tester to fuel inlet fitting. Apply 5 psi
pressure and observe for one minute. The needle and
seat should hold pressure indefinitely. If the pressure
drops, carefully inspect the needle and the needle
seat. The needle and seat can be replaced as an
assembly (needle and seat comes with float). If the
seat surface is damaged replace the carburetor.
Pressure Tester PN 2870975
5. Carefully inspect float bowl gasket and replace if
necessary. Install float bowl on carburetor.
6. Install float body.
7. Install air adjusting screw.
8. Install throttle slide.
9. Install jet needle.
10. Install funnel.
11. Install carburetors on snowmobile.
12. Synchronize carbs
13. Replace top caps.
CARBURETION
3.21