Hi Darren,
Have you heard of the Haynes book of lies????
Theres no need to remove the engine or gearbox to get at the final drive oil seal
The primary and clutch will suffice!!
BUT
Before you start stripping and dismantling!!! there are more sources than the seal to leak!!!
What grade oil did you put in the gearbox and how much??
The level plug is at the back of the box near the frame gusset , about level with the kickstart shaft
Fill the oil in the oval cover on the r/h side,
the plug on top of your box is not a filler plug but to fit the indexing plunger for a reverse camplate, What letters numbers are stamped on the box?.
If the bike is left parked on the sidestand oil will work its way along the sleeve gear bush and downwards!!
Worn bushes will also cause a leak
If the sprocket nut has loosened oil will leak along the splines between sprocket and sleeve gear
The seal is a special BSA part easily available, it is retained by a large circlip
I,m sure someone on the forum in your locality will put you in touch with a competent repairer
(I'm probably too far away from you??)
Regards
John O R
John,
"the Haynes book of lies". Ha ha, yes I should have known better from past experience!
I put in 20w/50 as it states in the book of lies. I followed the precedure of the oil level plug, so its not overfilled.
An indexing plunger, thats definately not in the book!!!
The letters on the box are STD (which I presume is a standard box) and the letter T
Just had another look and what you state "If the bike is left parked on the sidestand oil will work its way along the sleeve gear bush and downwards!!" is exactly the case.
Think I will chance just changing the seal first before going the whole hog and changing the bushes.
My mate who used to rebuild Vincents for a living has volunteered himself and me to do it. So glad we haven't got the completely dissemble the bike! Thanks for the info, much appreciated.
Darren