On FJ400D-equipped carbureted E-Z-GO Workhorse 1200 models, the documented factory carburetor uses a #106 main jet and #52 pilot jet. Confirm the engine before ordering, because earlier carbureted versions can use different jetting and later EFI versions have no carburetor jets.
Workhorse 1200 • Main & pilot jet sizes
Workhorse 1200 carburetor jet sizes at a glance
Main jet
Earlier Fuji-engine parts applications: #86 main; later FJ400D: #106
Pilot jet
#46 pilot; later FJ400D: #52
Altitude
Use the parts manual for the exact engine and year; altitude main jets vary
Before ordering
Identify the engine and carburetor, then read the number stamped on the existing brass jet.
Lean symptoms
Needing choke, surging or load bog can also come from a clogged passage, weak fuel supply or intake leak.
Rich symptoms
Black smoke or plug fouling can also come from a stuck choke, high float level or leaking needle valve.
How to choose the correct E-Z-GO Workhorse 1200 jet
Workhorse 1200 jetting symptoms
Needs choke to run
Clean the pilot and main circuits and check fuel supply and an intake leak before fitting a larger jet.
Bogs under load
A restricted main jet can cause this, but so can weak pump flow, low bowl fuel level or a blocked filter.
Black smoke / fouled plug
Check choke position, float level and needle sealing before assuming the main jet is too large.
Runs well only at low speed
Main-jet or main-nozzle restriction becomes more likely once the pilot circuit is known to be clear.
Poor idle only
The pilot circuit matters much more than the main jet at idle.
High-altitude operation
Use the model-specific elevation chart where available; do not guess how many jet sizes to reduce.
Workhorse 1200 jet specifications
Applies to: Carbureted gasoline version.
Engine: Fuji/Robin gasoline on earlier versions; 401 cc Kawasaki FJ400D on later documented versions.
Carburetor: Engine-generation-specific carburetor.
Main jet: Earlier Fuji-engine parts applications: #86 main; later FJ400D: #106.
Pilot jet: #46 pilot; later FJ400D: #52.
Altitude: Use the parts manual for the exact engine and year; altitude main jets vary.
Model-specific note
These models span more than one gasoline engine/carburetor family, so the vehicle name alone is not enough to choose a jet.
E-Z-GO Workhorse 1200 carburetor jet FAQ
What is the E-Z-GO Workhorse 1200 main jet size?
Earlier Fuji-engine parts applications: #86 main; later FJ400D: #106. These models span more than one gasoline engine/carburetor family, so the vehicle name alone is not enough to choose a jet.
What is the E-Z-GO Workhorse 1200 pilot jet size?
#46 pilot; later FJ400D: #52.
Does altitude change the E-Z-GO Workhorse 1200 main jet?
Use the parts manual for the exact engine and year; altitude main jets vary.
Can I install a larger jet in an E-Z-GO Workhorse 1200?
Only after confirming the engine, carburetor, altitude and cause of the lean symptom. A clogged passage, intake leak or weak fuel supply should not be corrected with an oversized jet.
How do I identify the correct E-Z-GO Workhorse 1200 carburetor jet?
Use the stamped jet number together with the engine code, carburetor ID and model year. Cross-check those identifiers against the matching factory parts or service information.
What is the difference between the main and pilot jet on an E-Z-GO Workhorse 1200?
The pilot circuit controls idle and very low-throttle fueling. The main jet becomes dominant as airflow, throttle opening and engine load increase.
Jet sizes can change with engine, carburetor revision, model year and altitude. This page applies to the carbureted gasoline version. Do not drill jets or assume a jet from another model is equivalent. Confirm the engine, carburetor ID and existing jet markings for your exact E-Z-GO Workhorse 1200. For manufacturer documentation, visit the official manufacturer website.