Quality management carburetor jets - size matters

Carburetor Jets - Size Matters

Especially for the smallest components like carburetor jets, we pay great attention to precision!

Carburetor jets, these tiny brass components, are one of the most important factors that determine the behavior and performance of our engine. Choosing the right bore, that is, the jet size, will make all the difference between frustration and joy while riding.

For example, with a jet for Dell'Orto carburetors, the embossed number on the jet indicates the bore diameter, and for Mikuni, the flow rate is specified instead of the bore size (as with Dell'Orto, PWK, etc.).

A jet with the label "50" has a bore of 0.50mm, and it increases in increments of a few hundredths of a millimeter. A 52 jet would therefore measure 0.52mm in the bore. For comparison: A human hair with 0.08mm would already make a noticeable difference between a 50 and a 58 jet.

For many carburetor manufacturers, we offer a wide range of jet sets and a large selection of individual jets.

Tip: Jet Set for Clean and Effective Tuning

The jet sets we offer under our BGM brand are regularly subjected to precise testing. Not only the fit and outer dimensions are checked, but the greatest attention is paid to the accuracy of the bore. Under a microscope, the jets are measured and compared with the actual size. The diameter is determined to the exact µm. One µm is one thousandth of a millimeter (0.001mm)

Carburetor Jets under the Microscope

Here’s an insight into a 118 jet. With a measurement of 1.1779mm, the bore deviation is only one thousandth of a millimeter, making it within the acceptable range and thus fine.