Gregory Bender


Slide needle specifications for Dellorto VHB motorcycle carburetors (V slides)

Detailed technical information regarding Dell’Orto motorcycle carburetors, how to tune, parts diagrams, slide specifications, needle specifications, jet specifications, and atomizer specifications.

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This information was gratefully provided by Chris Oates, who was sent this information by Eurocarb. I meticulously recreated the table of values from a somewhat difficult to read original. Therefore, mistakes may be present. Here is a link to the original image in case you would like to scrutinize any particulars.

VHB carburetor slide needle.
VHB carburetor slide needle.

Photo courtesy of Eurocarb.

Table: Slide needle series V

Type Value X Characteristic expressed in millimeters
ØA ØB C D E
V1 01 2.47 0.75 23.5 67.5 73.5
V2 02 2.5 1.9 22 67.5 73.5
V3 03 2.48 1.5 22 67.5 73.5
V4 04 2.5 1.5 22 67.5 73.5
V5 05 2.48 1.8 27 72.5 78.5
V6 06 2.45 1.9 20 67.5 73.5
V7 07 2.45 1.5 20 67.5 73.5
V8 08 2.45 1.7 18.5 67.5 73.5
V9 09 2.48 1.8 26 72.5 78.5
V10 10 2.47 1.5 23.5 67.5 73.5
V11 11 2.47 2.5 23.5 67.5 73.5
V12 12 2.5 1.5 20 67.5 73.5
V13 13 2.5 1.7 24 67.5 73.5
V14 14 2.4 2.1 20 72.5 78.5
V15 15 2.48 1.5 26 67.5 73.5
V16 16 2.47 1 25 67.5 72.5