Gregory Bender

O-ring sizes for 4 speed transmissions

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

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There is one O-ring used with the 4 speed transmissions: the O-ring for sealing the outer body of the throw out bearing assembly to the rear cover. There are two variations: one for 20 mm diameter outer bodies (early transmissions) and one for 22 mm diameter outer bodies (later transmissions).

O-ring to fit 20 mm diameter outer bodies

These measurements were made to the best of my ability (I do not know the original specification).

A -113 x-ring of the following actual dimensions also works well (contributed by Tony Sciandra of Caffe Fresco Specialty Coffee Roaster on the Yahoo! Loopframe_Guzzi news group).

This x-ring can be purchased from Precision Associates, part number 4444-113 or McMaster-Carr part number 90025K228.

O-ring to fit 22 mm diameter outer bodies

These measurements are accurate to the original specifications.