2000 Polaris Indy 500 / 600 snowmobile service manual, Page 140Get this manual
FUEL SYSTEMCARBURETION Component Effect vs Throttle Opening
DECREASING
INCREASING
THROTTLE OPENINGTYPICAL MIKUNI VM
Throttle Valve Cut-Away Jet NeedleNeedle Jet Polaris TM-38 Mikuni component effect versus throttle opening chart
needle valve main jet Main jet needle needle jet throttle valve Slow bypass pilot outlet air jet Start choke plunger starter jet fuel screw