2000 Polaris Indy 500 / 600 snowmobile service manual, Page 150Get this manual
FUEL SYSTEMCARBURETION Mikuni TM-38 Carburetor Service 3Place carburetor in an inverted position4Connect pressure tester 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)Pressure Tester PN 2870975