O-ring sizes for 5 speed transmissions

Moto Guzzi V7 Sport, 750 S, 750 S3, 850 T, 850 T3, 850 T3 California, V1000 I-Convert, V1000 G5, 1000 SP, Le Mans, Le Mans II, Le Mans CX 100, Le Mans III, Le Mans 1000, 1000 SP III, 1000 S, California II, California III, California 1100, California Jackal, California EV, California EV Touring, California Aluminium, California Titanium, California Special, California Special Sport, California Stone-Metal, California Stone-Touring, California Classic, California Touring, and California Vintage models

Created: 2012 December 07

Updated: 2021 July 28

There are six O-rings used with the 5 speed transmissions (not all six are used with all 5 speed transmissions). These measurements are accurate to the original specifications. Thanks to Mark Lopeman for providing some clarifying details.

• O-ring for the shift shaft, fits inside the rear cover (MG# 90706140; OR 3056): 13.94 mm ID × 2.62 mm wide
• O-ring for the clutch input hub (MG# 90706203; OR 3081): 20.3 mm ID × 2.62 mm wide
• O-ring for the for the layshaft/output shaft, fits between 1^st gear and 5^th gear (MG# 90706203; OR 3081): 20.3 mm ID × 2.62 mm wide
• O-ring for the for the layshaft/output shaft, fits over the splines between 5^th gear and the bearing or shim (MG# 90706219; OR 2093): 23.52 mm ID × 1.78 mm wide
• O-ring for the clutch input hub, fits into the groove on the shaft (MG# 90706235; OR 2081): 20.35 mm ID × 1.78 mm wide
• O-ring for the 22 mm diameter outer body of the throw out bearing assembly (MG# 90706170; OR 3068): 17.13 mm ID × 2.62 mm wide