Gregory Bender
 

O-rings internal to the I-Convert transmission

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:

Updated:

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Thanks to Darrell Dick, Jim VanDenBerghe, Jack Huisinga, and Leonard Watkins for providing information specific to alternative cross-sections for several of these O-rings via email and on the old Yahoo! MGconvert news group (which has now moved to Groups.io).

Location Part number UNI O-ring code ID Cross-section

Clutch assembly (in front)

Note: It has been suggested that the original cross-section of this O-ring is too small; 3 mm or 3.5 mm is recommended.

Not all people report problems with the originally specified O-ring. Use your own judgment.

 MG# 90706600 OR 3237 59.99 mm 2.62 mm

Clutch assembly (in groove on shaft)

Note: It has been suggested that the original cross-section of this O-ring is too small; 3 mm is recommended.

  • Darrell Dick reports good results with AS 568 A -114. The cross-section of this O-ring is identical to Guzzi's original specification (2.62 mm); only the ID is slightly smaller (15.54 mm).
  • Jim VanDenBerghe reports good results with a 3 mm × 16 mm O-ring, such as this Viton one from McMaster-Carr part number 9263K724.
  • Leonard Watkins also reports good results with a 3 mm × 16 mm O-ring (same size used by Jim VanDenBerghe). Leonard's tranmission number is G01767 ().

Not all people report problems with the originally specified O-ring. Use your own judgment.

 MG# 90706158 OR 121 15.88 mm 2.62 mm

Clutch assembly (around bearing)

Note: It has been suggested that the original cross-section of this O-ring is too small; 3 mm or 3.5 mm is recommended.

Not all people report problems with the originally specified O-ring. Use your own judgment.

 MG# 90706473 OR 3187 47.29 mm 2.62 mm
Input (clutch) shaft MG# 90706188 OR 2075 18.77 mm 1.78 mm
Output shaft (layshaft) MG# 90706222 OR 130 22.23 mm 2.62 mm

Shift shaft

Note:

  • Jack Huisinga reports good results with AS 568 A -013. AS 568 A -013 has the same physical dimensions as UNI OR 2043 (1.78 mm × 10.82 mm)
 MG# 90706108 OR 2043 10.82 mm 1.78 mm