Gregory Bender

O-ring for sealing the outer body of the throw-out bearing assembly

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


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There are two sizes of outer bodies. 20 mm diameter outer bodies were used on the early 4 speed transmissions. 22 mm diameter outer bodies were used on the later 4 speed transmissions and all of the 5 speed transmissions. These measurements were made to the best of my ability.

20 mm diameter outer bodies

MG# 90706150: 15.3 mm ID × 20.1 mm OD × 2.4 mm wide

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): 0.549 inch ± 0.007 inch ID × 0.755 inch OD × 0.103 inch cross-section. Nominal dimensions are 916 inch ID × 34 inch OD × 332 inch cross-section. This x-ring can be purchased from Precision Associates, part number 4444-113 or McMaster-Carr part number 90025K228.

22 mm diameter outer bodies

MG# 90706170: 17 mm ID × 22 mm OD × 2.5 mm wide