Gregory Bender
 

Transmission - Comparison of early and late 4th gear and bushing used in 4 speed transmissions

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

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Updated:

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Thanks to Charlie Mullendore of Antietam Classic Cycle for sending me this information.

Late gear and bushing on left, early on right. Guzzi apparently revised the bushing and gear to correct the problem of the 4th gear bushing fracturing at the flange.
Late gear and bushing on left, early on right. Guzzi apparently revised the bushing and gear to correct the problem of the 4th gear bushing fracturing at the flange.

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.

The outer diameter of the late bushing (and ID of the gear) is 24 mm, the early bushing and gear is 23 mm.
The outer diameter of the late bushing (and ID of the gear) is 24 mm, the early bushing and gear is 23 mm.

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.

The late bushing has crossed oiling grooves inside.
The late bushing has crossed oiling grooves inside.

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.

The early bushing has a shallow groove inside and out with two radial holes.
The early bushing has a shallow groove inside and out with two radial holes.

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.

Found that I had some Multipurpose 932 Bearing Bronze already, so thought I'd try making one of the early type bushings since they are no longer available anywhere in the world. In about 45 minutes I had turned the one on the left out.
Found that I had some Multipurpose 932 Bearing Bronze already, so thought I'd try making one of the early type bushings since they are no longer available anywhere in the world. In about 45 minutes I had turned the one on the left out.

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.

Fits on the shaft perfectly...
Fits on the shaft perfectly...

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.

...and in the gear as well.
...and in the gear as well.

Photo courtesy of Charlie Mullendore of Antietam Classic Cycle.