2007 Polaris Two Stroke Snowmobile Workshop Repair manual, Page 93Get this manual
FUEL DELIVERY Assembly
1234Install the main jet (20), pilot jet (21), and starter jet (22)Install floatneedleseat assembly (19)Place carburetor in an inverted positionConnect pressure tester (PN 2870975) to fuel inlet fittingApply psi pressure and observe for one minuteThe needle and seat should hold pressure indefinitelyIf the pressure drops, carefully inspect the needle and the needle seatThe needle can be replaced (needle comes with float and seat)
CARBURETOR SYNCRONIZATION
Throttle Valve Synchronization