<-=- Club Bevel Heaven -=->

Lumpy,
I see no one has replied to you yet so here goes.
The four digit numbers (4777 etc.) on the Borrani was an internal code number that they used to identify which manufacturer, and on which model the rim was going on and whether it was front or back.
In your case the 4777 was used on the front ...

Have you tried swapping out one or more of the other covers to see if that effects your leak? You didn't mention this. It could have a breech from debris hitting it from the front tire. It does take a beating from the front tire throwing up debris.
If it is a porous cover one of the others might ...

froggie,
Looks like you are on the right track now.

froggie,
When you remove the horizontal/front cylinder cover the cam end should look like the rear/vertical cam end.
You still will need the three pieces/parts shown in the parts diagram to assemble on the cam end to transfer rotation to the tach drive.
What I don't know is if Ducati assembled all ...

That last picture you show with the bevel cover removed appears to be the vertical head.
The mechanical tach drive is driven off of the horizontal or front head cam.
The vertical head has no provision for driving the tach.
The parts diagram shown is of the horizontal head. The parts you indicated ...

$540,000. Didn't make reserve.

Didn't know where else to put this.
Interesting significant Ducati.

https://bid.goodingco.com/lots/view/1-9 ... mola-desmo

The squared off fenders would almost certainly make it a late (67-68) Monza.
Congratulations and happy wrenching.

The exhaust could be a Verlicci.
Pics are hard to come by.
A friend of mine had a Verlicci on his 750F1B. The sound was incredible.
Closest I got was a Phil Ansley photo.

Never mind. The answer is yes, no problem.

Thanks in advance for the help. Yes, I've searched high and low for the answer. There's not much info out there about the early leading axle Marzocchis.
All of the manuals I've found deal with the center axle forks.
I have to replace the o-ring on the large nut at bottom of the leading axle 38mm ...

You could try here for the fairing
http://gftpstore.com/Fairings_c4.htm
and here for the wind screen.
https://bikescreen.com/pages/search-res ... e?q=ducati
I have products from both and have been pleased with them.
Dean

Second what Steve said.
Dean

Here is a link to the AHRMA Marketplace ads from Jan 2017 issue.
Bottom left,
It appears that this business has no web site.
Dean

http://www.ahrma.org/web-ads/market-place-ads/

You didn't mention where you are located geographically or what bike this is for
but this business advertises on the AHRMA (vintage MC racing) web site and in their rule book.

Tool Salvage & Motorcycle Works, 15709 Euclid Ave., Cleveland, OH 44112; 216.451.5500.

I have not used them but know that ...