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Odd carburettor on the W/NG
Posted: Sat Jan 20, 2018 8:10 pm
by Michael.Brown
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
Re: Odd carburettor on the W/NG
Posted: Sat Jan 20, 2018 8:45 pm
by dave.owen
It will certainly go better, you will also benifit from putting in a decent cam.
Dave
Re: Odd carburettor on the W/NG
Posted: Sat Jan 20, 2018 8:52 pm
by simon.holyfield
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!
Re: Odd carburettor on the W/NG
Posted: Sat Jan 20, 2018 9:02 pm
by Michael.Brown
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
Re: Odd carburettor on the W/NG
Posted: Sat Jan 20, 2018 10:29 pm
by simon.holyfield
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.
Re: Odd carburettor on the W/NG
Posted: Sat Jan 20, 2018 10:32 pm
by simon.holyfield
Re: Odd carburettor on the W/NG
Posted: Mon Jan 22, 2018 7:15 pm
by Michael.Brown
Thank you Simon
Mike