Carburetor throttle slides - Dellorto VHB

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

Created: 2014 July 15

Updated: 2014 July 15

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Dellorto VHB carburetors use a flat or square throttle slide. These slides were available in various sizes: 7454-60, 7454-50, and 7454-40, to name three. The difference between the slides was in the amount of cut-away on the side that faced away from the intake manifold (the back face).

A 7454-60 was cut back 6 mm.
A 7454-50 was cut back 5 mm.
A 7454-40 was cut back 4 mm.

The photos below demonstrate the differences between Dellorto 7454-60 and 7454-40 throttle slides.

7454-60 left; 7454-40 right. Back face side shown. 7454-60 is cut back 6 mm; 7454-40 is cut back 4 mm.
Photo courtesy of Gregory Bender.

7454-60 left; 7454-40 right. Side view shown to comare back face. Back face of 7454-60 is cut back 6 mm; back face of 7454-40 is cut back 4 mm.
Photo courtesy of Gregory Bender.

7454-60 left; 7454-40 right. Front side shown. No difference between them.
Photo courtesy of Gregory Bender.

7454-60 left; 7454-40 right. Side view shown compare front face. No difference between them.
Photo courtesy of Gregory Bender.

7454-60 left; 7454-40 right. Top view shown. No difference between them.
Photo courtesy of Gregory Bender.

7454-60 left; 7454-40 right. Bottom view shown. No difference between them.
Photo courtesy of Gregory Bender.