Footboard - grease zerks for brake and shift levers
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
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The grease zerk (MG# 94020060) for the brake and shift levers have a thread size of: 6 mm × 1 mm.
These seem to be commonly lost. Were I to need a replacement, I would likely purchase McMaster-Carr part number 2250K11.