Standard Jetting Specifications Carburetor # Venturi Size Main jet (VM4/042) Pilot Jet (M28/1001) Needle Jet Jet Needle Throttle Valve Air Jet Needle Valve VM20-273 20 180 22.5 O-6 4J13 2.0 0.5 1.5

Mikuni's VM Series, round slide carburetors have proven themselves as the performance standard for use on single and multi-cylinder, motorcycle and ATV vehicles. They're perfect carbs for street riding, motocross, enduro and trail riding, as well as flat track and road racing. These carbs are designed to work on both 2-stroke and 4-stroke engines.

VM series carburetors offer a large selection of bore sizes for optimal fuel mixture and flow to match most engine modifications. A wide range of tuning components are available to allow precise fuel mixture metering in almost any application, at any throttle setting and under any riding condition.

NOTE:

• The main jet on this carburetor is not located in the typical VM carburetor location at the base of the needle jet. It is attached to a jet extender//holder which also doubles as a drain plug for the float bowl.
• Mikuni does not offer an alternate needle jet for this carburetor