Laverda 1000 3C airbox photo`s

[Cyriel]

I`m restoring a drumbrake 1973 3C.
Does someone have photo`s from a Laverda 1000 3C airbox? In particular the mounting points below and above.
Also i`m looking for photo`s from the egine breather hose/rubber direct to the airbox?? There is an hole in the airbox just above the breather  cover.

Airbox and egine breather is for example different than a later 1974/75 model.

Many thanks,

 

[mcnicol]

Cyriel, sorry, no pics after this time, but I can tell you my '73 3c (bought with just over 1000 miles on it) had the same vent hose as my '78, rubber ball vent with the hose running down between the back of the gearbox and the front side of the swingarm pivot tube. No connection to the air filter at all. What was different was the 4 little right angle brackets bolted to little tabs on the frame, 2 at the top of the airbox, 2 at the bottom, with little M5 bolts with Nyloc nuts holding the airbox to the frame.
The airbox cracked around the 2 bottom ones after a year or two, and it was a buggar of a job trying to find an adhesive that would work with the airbox plastic. I ended up finding an epoxy that worked well enough to glue repair patches of black Perspex to the airbox.

Ken

 

[3patC]

Cyriel, I will take a look at a bike I have here. The box is broken but it may give me some clues.
If you attach the early boxes using the four mounting brackets mentioned by Ken they will crack. If you leave the top two mounts unfastened they last longer.
The early breather outlet looks different, it has a pin across the top through the alloy casting. I dont know about the hose.

 

[Tony R]

Cyriel, I just took hese photos of the airbox from my '74 3C. No connections for the breather pipe, just the usual cracks.

Tony

 

[3patC]

Just checked a 73 bike and the airbox is like the pics from Tony R. Dont know if it's the original after all this time but it certainly looks wrecked enough to be original with all the attendant bodging.
Looking at the early pictures on Marcos 'talking about the drum brake 3C' thread the hose appears different on the first bikes.

 

[Rusty Spokes]

Wolfgang has the replacement 3c airbox..if you need one.

 

[tom3c75]

Cyriel,

The airbox on my 75 3C was mounted to the frame on each side of the box, top and bottom, using nuts and bolts.    This arrangement is fairly rigid and eventually resulted in the airbox plastic fracturing at the mounting points.

I have now fitted the mounting arrangement used on my 82 Mirage, shown in the attached pic.    This consists of a bracket fitted to each side of the bottom of the airbox. These brackets then clip over the mounting lugs on the frame.  The top of the airbox is supported via the air hoses.   

Using this approach is secure and also makes it very easy to remove the airbox, which was a real pain with the old mounting set up.

Tom

 

[Cyriel]

Thanks for all your help!
Now a found 3 types of a Laverda 1000 airbox:

Numbers are all the same

Early rubber breather hose
Does someone if i must put filter material is this opening? See photo.

Standard breather hose don`t fit

 

[dja981]

Those numbers are not parts numbers I think they are homologation numbers.

                                                Dave

 

[3patC]

That short hose must be the very first type. The alloy breather outlet looks like the one I have here with the pin across the top. I've never seen an airbox without the cut out in the base until now.

 

[ianmaro]

I've never seen an airbox without the cut out in the base until now.

That's the original drumbrake 3C airbox.

Early rubber breather hose
Does someone if i must put filter material is this opening? See photo.

No filter material needed there.

Ciao
Marco