600 Twin Carburetter Adapter

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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600 Twin Carburetter Adapter

Postby ajsph » Mon Dec 31, 2018 10:32 am

I have a set of twin carburetter adaptors, but I can`t see how the ring is sealing in the buttom of the recess, any help appreciated

Poul

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Re: 600 Twin Carburetter Adapter

Postby ajsph » Sun Jan 06, 2019 6:04 pm

No help at all?
Poul

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Re: 600 Twin Carburetter Adapter

Postby Mick D » Sun Jan 06, 2019 6:12 pm

Hi Poul

Does the 'O' ring in it's housing not seal against the adaptor and then the carb 'O' ring seal against the adaptor 'O' ring housing?

Difficult to be sure of dimensions from the photo

Regards Mick

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Re: 600 Twin Carburetter Adapter

Postby ajsph » Sun Jan 06, 2019 6:38 pm

No the o ring canĀ“t seal in the buttom, it is leaking around the holes for the allen bolts
Poul

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Re: 600 Twin Carburetter Adapter

Postby Mick D » Sun Jan 06, 2019 6:46 pm

Hi Poul

Could you fit a fibre gasket in addition to the 'O' ring? Would it be clamped between the 'O' ring holder and the adaptor when the carb is torqued up?

Regards Mick

Edited for another thought:

Is the 'O' ring supposed to seal against a carb insulator and the adaptor to seal against the other side of the 'O' ring holder via a fibre gasket?

Mick

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Re: 600 Twin Carburetter Adapter

Postby ajsph » Sun Jan 06, 2019 6:49 pm

no, the o ring housing has the same thickness as the recess in the flange.
Poul

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Re: 600 Twin Carburetter Adapter

Postby ajsph » Sun Jan 06, 2019 7:01 pm

the o ring was fitted against the carburetter

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Re: 600 Twin Carburetter Adapter

Postby Mick D » Sun Jan 06, 2019 7:07 pm

Hi

I think it was designed to be used in conjunction with an insulator - why have two 'O' ring seals, (the adaptor and the carb), adjacent?

If the adaptor recess and housing are the same depth then inserting a gasket will provide the 'clamp up'

Regards Mick

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Posts: 180
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Re: 600 Twin Carburetter Adapter

Postby ajsph » Sun Jan 06, 2019 7:13 pm

when the o ring housing is too high, it will bend the carburetter flange. I am sure it is original factory parts

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Re: 600 Twin Carburetter Adapter

Postby Mick D » Sun Jan 06, 2019 7:48 pm

Hi

The carb flange will be against the insulator, the fibre gasket only needs to be a few thou thick.

I think you need to consider adding a couple of insulators / spacers:

https://www.google.co.uk/search?q=amal+ ... 21&bih=699

Regards Mick

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