Standard Genuine Honda GX390 21mm Carburetor.
Big increase in performance over standard Carburetor, and easy to setup.

This carburetor started life as a standard Genuine Honda GX390 carburetor with a 21.5mm bore which has been machined on our milling machine to 23.5mm and then finished by hand porting & polishing for a perfect finish with a final 24mm bore size which dramatically increases its airflow, combined with its reworked fuel circuitry this carburetor is ideal for open engines and can help to achieve over 20HP!

Kit Includes:

Genuine Honda GX390 Bored & Hand Ported/Polished 24mm Carburetor,
Airfilter Adaptor,
High Flow Air Filter,
GX390 Carb To GX200/GX160 Cylinder Head Adaptor Plate,
Gaskets,
Jetted Carburetor.

This is the ultimate GX390 carburetor setup, precisely machined and finished by hand for optimum flow. Capable of 20HP!+
 

CNC machined high flow airfilter adaptor plate for GX390 carburetors.

CNC machined adaptor plate to allow a GX390 carburetor to fit to a GX200 cylinder head.
Hardware & Gaskets needed are included. *This is designed for a 15* tilted engine mount. For flat engine mounts, please use with our flat mount adaptor plate.*

GX390 Flat Mount Adaptor Plate - Use with our 15* GX390 Carb to GX200 Head Adaptor plates when using flat engine mounts.

Curved High Flow Airfilter for use with both our GX160/GX200 & GX390 Filter Adaptors.

Genuine Honda main jet for GX160 & GX200 engines. Select size from the drop down menu.
Part no: 99101-ZH8-HON