Standard Jetting Specifications Carburetor # Venturi Size Main jet (VM4/042) Pilot Jet (VM22/210) Needle Jet Jet Needle Throttle Valve Air Jet Needle Valve TM38-102 38 340 25 Q-2 6FJ40 4.0 2.5 Body 1.5
TM Series Carburetors provide significant performance improvements over older design round slide carburetors. Air flows faster and smoother through the TM Series venturi due to the flat slide configuration and the jet blocks which help create a smoothbore effect. The high velocity of the air flow means a stronger vacuum at the needle jet, providing more precise metering and better throttle response.
NOTE: snowmobile specific carbs are equipped with a cable activated choke(enrichener). Cable not included.