Twin Carb’s

[lhodgo]

Any preference on fibre over paper gaskets and plastic over copper filters? I have both as a backup, wondering which to fit straight up? Thanks.

[carlo rossi]

all good I prefer fibre and copper
old school

[lhodgo]

Well I've got both, might go old school and keep the others as spares!

[lhodgo]

So I've got some aluminium mounts to upgrade from the original rubber ones and some 50mm extensions to increase the inlet and get some better performance (I hope). Question is, where does the rubber o ring seal? Against the carb (top one in image) against the extension (bottom one in image) or should I flip the entire layout and have the mount and o ring against the manifold?

Thanks

[carlo rossi]

between the carb and the ext tube is where the o ring goes

[lhodgo]

Hang on the top outlet or the bottom outlet in my photo? See how I've got two options in the image?

[carlo rossi]

generally its right between the carby and the manifold or the adapter
thats if i understand the question

[lhodgo]

My carbi mounts have a rubber 'o' ring on ONE side only. I'm trying to work out if the rubber 'o' ring pushes up against the carbi or against the 50mm extensions I've also added. Or are you saying I should have the 50mm extensions against the carbi, then the 'o' ring side of the aluminium mount facing the manifold?

If you look at the photo,  the top outlet has the o ring facing the carbi with the lower outlet facing the 50mm extensions.

Trying to work out which is the correct option in that photo.

Thanks.

[lhodgo]

I've circled the o rings in red

[LaStregaNera]

Standard practice is to have the o-ring against the carb.

[Craig_m67]

There's a lot of discussion on the AlfaBB (US) about the correct way to install aluminium carb mounts (vs rubber), and any issues that people then solved etc..

I've not installed them on either of my 105 Nords so have no experience to offer.

I only chime in as I remember it being very topical at one stage and I was considering it - in the end i did nothing, just drive 
(perhaps when the original [Pirelli?] rubber mounts were unobtanium)

[bonno]

Straight from the horses mouth regarding o-ring position relative to carby and manifold (eliminate vibration between engine and carburettor/s). Find attached link to the weber website on soft mount kit.
https://www.weberperformance.com.au/index.php?cPath=115_101

[carlo rossi]

the top circle
immediatley after the carby either will do
but both the same is ideal

[lhodgo]

Awesome guys, thanks heaps!!!