1992-1993 Yamaha V Max 4 VX750 Snowmobile Factory Service Manual, Page 43Get this manual
CARBURETOR TUNING
CARBURETOR TUNING
The carburetor is set at the factory to run at temperatures of ooe-2o (32F-4F) at sea levelIf the machine has to be operated under conditions other than specified above, the carburetor must be reset as requiredSpecial care should be taken in carburetor setting so that the piston will not be damaged or seized
In this model, the engine oil is mixed with the fuel just before the fuel enters the carburetorsDuring initial fuel flow to the carburetor it is not always possible to supply the optimum fuelloil mixture depending on the throttle opening.Thereforeafter the carburetors have been tuned or maintained, or after the float chamber is removed for cleaning or jet replacementbe sure to idle the engine for about three minutes in order to avoid engine trouble