Odd carburettor on the W/NG

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Michael.Brown
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Odd carburettor on the W/NG

Postby Michael.Brown » Sat Jan 20, 2018 8:10 pm

Hi all,

I have been having a check over of my new acquisition, a 1942 W/NG and have found that it is fitted with an Amal 276/434R and not the 275B/IJ I expected.

What bike was fitted with the 276/434R originally?

Will it run happily on it?

Mike
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1960 Ariel Leader
1942 Ariel W/NG

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dave.owen
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Re: Odd carburettor on the W/NG

Postby dave.owen » Sat Jan 20, 2018 8:45 pm

It will certainly go better, you will also benifit from putting in a decent cam.
Dave
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simon.holyfield
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Re: Odd carburettor on the W/NG

Postby simon.holyfield » Sat Jan 20, 2018 8:52 pm

I'm not sure what your carburettor is from, but from your picture the float chamber looks OK and the carb is a 276.

I'd have a look at the jetting and the slide but if it starts, idles and runs OK I wouldn't worry too much.

There's a thread on here somewhere with a list of modifications people make to W/NGs, which as Dave says includes the cam.

Mine is faster than my Bantam, but not much. Actually the speedo reads about 10% low, so maybe I am being a bit unfair!
cheers

Simes

'51 Square Four, Masquerading D3 Bantam, '58 Huntmaster, '42 W/NG, http://ariel-square-four.blogspot.com

Michael.Brown
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Re: Odd carburettor on the W/NG

Postby Michael.Brown » Sat Jan 20, 2018 9:02 pm

Thanks Dave and Simon,

It starts first kick, idles fine and runs nicely so I will leave alone for the moment. Is the 276 a bigger bore?

As I get to know the bike a little better I will find out more. You never know it might have a different cam in it already.

Only thing that requires attention at the moment is the charging. I have been told it was fine but on the test run it wasn't charging. The regulator is supposed to be an electronic one but I have yet to check that out. I will check the Dynamo output...........................what is the best way?

Battery is past its best so will replace that to.

Mike
1960 Ariel Leader
1942 Ariel W/NG

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simon.holyfield
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Re: Odd carburettor on the W/NG

Postby simon.holyfield » Sat Jan 20, 2018 10:29 pm

If I recall correctly the 276 is 1"; the 275 is 7/8". Coincidentally, my W/NG runs a 276 from a Triumph 3HW, though its jetted for a W/NG.

The story is on my blog, a few posts back.
cheers

Simes

'51 Square Four, Masquerading D3 Bantam, '58 Huntmaster, '42 W/NG, http://ariel-square-four.blogspot.com

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simon.holyfield
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Re: Odd carburettor on the W/NG

Postby simon.holyfield » Sat Jan 20, 2018 10:32 pm

cheers

Simes

'51 Square Four, Masquerading D3 Bantam, '58 Huntmaster, '42 W/NG, http://ariel-square-four.blogspot.com

Michael.Brown
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Re: Odd carburettor on the W/NG

Postby Michael.Brown » Mon Jan 22, 2018 7:15 pm

Thank you Simon

Mike
1960 Ariel Leader
1942 Ariel W/NG


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