If as you say, the gear box oil is contaminated the( oil should be clear ) I would consider draining the oil and refilling with a good E P oil. In all the years I have owned a vincent I have never seen the oil come out contaminated as you described , possibly the machine has been sitting for a long time and, condensation has formed in the gear box causing some corrosion to form.If the oil leaking out is similar to the colour of the oil in the gearbox, it could likely be the output shaft bushes have collapsed, thus the red/gold tinge coloring of the oil........not an uncommon problem, and not too difficult to repair, if not messy.
Whilst doing that you could always calibrate the the dip stick.
An old simple dodge to prevent oil seeping down the main shaft is tap the bush G16 (should that be G17? BigEd ) back into the shaft G4 and fit a very fine O ring between the end of the shaft, and G26 ratchet spring cup.
Last edited by a moderator: