The documented carbureted E-Z-GO Terrain 500 uses a 401 cc Kawasaki FJ400D with a #106 main jet and #52 pilot jet. Use the exact model-year parts manual if an altitude-specific replacement jet is required.
Terrain 500 • Main & pilot jet sizes
Terrain 500 carburetor jet sizes at a glance
Main jet
#106 standard
Pilot jet
#52 standard
Altitude
Use the Terrain service-parts manual for any altitude-specific replacement jet
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 Terrain 500 jet
Terrain 500 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.
Terrain 500 jet specifications
Applies to: Carbureted gasoline version.
Engine: 401 cc Kawasaki FJ400D single-cylinder OHV gasoline.
Carburetor: Fixed-float-bowl Kawasaki carburetor.
Main jet: #106 standard.
Pilot jet: #52 standard.
Altitude: Use the Terrain service-parts manual for any altitude-specific replacement jet.
Model-specific note
E-Z-GO's Terrain 250/500/1000 service-parts manual lists #106 main and #52 pilot jets for the documented carburetor.
E-Z-GO Terrain 500 carburetor jet FAQ
What is the E-Z-GO Terrain 500 main jet size?
#106 standard. E-Z-GO's Terrain 250/500/1000 service-parts manual lists #106 main and #52 pilot jets for the documented carburetor.
What is the E-Z-GO Terrain 500 pilot jet size?
#52 standard.
Does altitude change the E-Z-GO Terrain 500 main jet?
Use the Terrain service-parts manual for any altitude-specific replacement jet.
Can I install a larger jet in an E-Z-GO Terrain 500?
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 Terrain 500 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 Terrain 500?
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 Terrain 500. For manufacturer documentation, visit the official manufacturer website.