Carburetor jets

Suzuki DR350 motorcycles, 1990 - 1999.

Created: 2012 June 14

Updated: 2012 June 14

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Mikuni TM33 SS pumper carburetor

Pilot jets

The VM28.486 series of jets is what will work in the stock dirt carburetor (Mikuni TM33 SS). The N224.103 series of jets may look like they will work, but they will not fit.

VM28/486 pilot jet for the Mikuni TM33 SS carburetor as used on the DR350.
Photo courtesy of Niche Cycle Supply.

Main jets

The N100.604 series of jets is what was fit from the factory. The N102.221 series of jets will also work perfectly well, although the diameter of the head is smaller.

The dimensions of the N100.604 jet are as follows.

Diameter of the slotted head: 8 mm
Overall length: 9 mm
Thread size: 5 mm × 0.75 mm

The dimensions of the N102.221 jet are as follows.

Diameter of the slotted head: 6 mm
Overall length: 9 mm
Thread size: 5 mm × 0.75 mm

N100/604 main jet for the Mikuni TM33 SS carburetor as used on the DR350.
Photo courtesy of Niche Cycle Supply.

Mikuni BST33 SS constant velocity carburetor

Pilot jets

The N151.067 series of jets is what will work.

N151.067 pilot jet for the Mikuni BST33 SS carburetor as used on the DR350 S and DR350 SE.
Photo courtesy of Niche Cycle Supply.

Main jets

The N100.604 series of jets is what was fit from the factory. The N102.221 series of jets will also work perfectly well, although the diameter of the head is smaller.

The dimensions of the N100.604 jet are as follows.

Diameter of the slotted head: 8 mm
Overall length: 9 mm
Thread size: 5 mm × 0.75 mm

The dimensions of the N102.221 jet are as follows.

Diameter of the slotted head: 6 mm
Overall length: 9 mm
Thread size: 5 mm × 0.75 mm

N100/604 main jet for the Mikuni BST33 SS carburetor as used on the DR350 S and DR350 SE.
Photo courtesy of Niche Cycle Supply.