Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 156Get this manual
CARBURETION Adjustments Throttle Synchronization ProcedureMikuni TM-38TM-40Flatslide Carburetors
Mikuni TM-38TM-40 carburetors are synchronized at wide open throttle without the engine runningThe middle carburetor on triples, and the PTO side carburetor on twins have non-adjustable set screw on the throttle shaftThis carburetor is what the other carb(s) is synchronized to1Remove airbox 2Remove top caps on all carburetors