Carb to Manifold Question

[Magista]

Pulled the carb on the A7 as it was hanging on idle after it got good and warm. Found some varnish and muck here and there. Cleaned everything and blew it out. Made sure everything operates as it should without sticking.

I found there wasn't an O ring on the carb side of the drippy tray/slidey thing (like my technical names?). Easy fix as I have a huge O ring kit. My question is, on the manifold side is there supposed to be an O ring as well?

[RDfella]

In a word - no. But the gasket should match the manifold / carb bore.

[muskrat]

G'day Magista.
As RD says.
I'm assuming you have a concentric carb with the O ring. What size?
Your tufnol heat spacer should match the manifold hole and the carb.
Manifold, gasket, spacer, gasket, drip tray, O ring, carb.
With that miss match the intake will be subject to extra turbulence and restrict it.
Cheers

[Magista]

Thank you for the responses.

Everything is in order and carb has been reinstalled with the proper O-ring on the carb side. Everything matches and is operating freely as it should.

Previous owner had made a boot from the filter to the carb featuring duct tape and a strip of rubber held in place by wire. All of that will be binned. Now the hunt for the proper part...which I assume shouldn't be difficult to find.

I was also impressed with the original filter. Looks to be wire mesh with a finer mesh sandwiched between the layers. Neat to see it was still on the bike.

[trevinoz]

Good luck with the sleeve.
The so-called fuel we get today ate mine in a short time.

[Magista]

Good luck with the sleeve.
The so-called fuel we get today ate mine in a short time.

Both of my bikes are only filled with ethanol free fuel. We have a station close by.

[BSA_54A10]

It is not just ethanol, which if you ride regularly, or drain the tank after each ride is not a problem.
It is the other muck thy put into fuel ( which has not been petrol for decades that is the problem, unless of course you have a polyester tank .
For decades "fuel" has been used to dispose of excess and dirty organic solvents .
You have probably noticed that some days it smells like an old shoe repair shop ( excess Benzine ) or paint stripper ( excess tolluene ) or sot of a honey smell, ( excess xylene ) etc etc etc .
IT is one of the big jokes about going to "clean green E vehicles" because when we do then all of this rubbish will just get flared off , so in place of running through an engine and at least being used for a purpose, it will just fuel 20' high dirty yellow fuel rich flames at the top of a chimney stack .

[trevinoz]

I wasn't using ethanol fuel but it still disintegrated.

[Magista]

I wasn't using ethanol fuel but it still disintegrated.

Are we talking about the rubber boot from the air filter to the carb? I'm unclear about which piece you are referring to.

[trevinoz]

I'm talking about the "boot".

[Magista]

I'm talking about the "boot".

Thank you, I'm a dumb American. Took me forever just to figure out what everyone meant by "tickover."

[Magista]

I think you're great, not dumb at all.

Don't be afraid to ask, particularly if it's just a silly thing like regional (or country) translations.

Hey it's the C21, folks.

Thanks, appreciate it. Everyone here has been very pleasant and helpful.

[muskrat]

G'day Magista.
There's no such thing as a silly question. You might get some weird answers so you might need to filter.
If you don't know ask. Saves time and $$$
Cheers

[Magista]

G'day Magista.
There's no such thing as a silly question. You might get some weird answers so you might need to filter.
If you don't know ask. Saves time and $$$
Cheers

Appreciate it.

Here's another question regarding the stock filter. Mine is/was dry. Is this how they are supposed to be used? The UNIs on my Honda CL350 use a tacky spray to help catch particles. K&Ns need to be oiled/sprayed.

[Magista]

Hi,

In my manual it states.

A7 STD A10 GF  Uncouple the rubber connection at the carburettor end, then undo the 2 bolts in slotted holes which secure the filter body and lift it out sideways. 
The filter is secured in the body with a wire circlip which can be prised out with a screwdriver.  Wash thoroughly in petrol, dry, and replace.

Looks like your filter is used dry.

The A7 SS and A10 SR have an 'to order only' filter which  is 'moistened with a light oil' like the A65 cloth / wire gauze round chrome type, I presume.

P.S.  I wouldn't worry to much about oiling or not, your rocker-box and head joints will take care of that sort of thing, automatic oiling system.

Thank you. This answers my question.