WD Motorcycle forum

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Oct 31, 2011 - 8:53PM

Norton needle jet

What is the standard size of the needle jet for a 1940 wd 16h?
I know that the part number is 4/061 but don't know the size.
Jet's size is 170.

email (option): Ferrarakias@hotmail.com

Rik

Oct 31, 2011 - 9:06PM

Re: Norton needle jet

The Amal literature all states simply 'Needle jet - Standard'

Isn't it a 106?

What have you got at the moment ? The size should be engraved on the side. It can be quite lightly done and hard to see.

Kostas

Oct 31, 2011 - 9:41PM

Re: Norton needle jet

It's too faint to tell!
What size do you use?
Maybe 107 is better? It's exactly the middle of the available sizes...

email (option): Ferrarakias@hotmail.com

Ron Pier

Oct 31, 2011 - 10:01PM

Re: Norton needle jet

Kostas/Rik I just sent you a scan from the latest Amal cat. It's a 4/061 106. Ron

email (option): ronpier@talk21.com

Rik

Oct 31, 2011 - 10:04PM

Re: Norton needle jet

I have a 106 in but that replaced a late-war stainless jet marked 106,5 and to be honest I couldn't really notice any difference.

Ian Wright

Oct 31, 2011 - 11:13PM

Re: Norton needle jet

Stainless carb jets?...I must have one ...Ian

email (option): ian@wright52.plus.com

Rik

Oct 31, 2011 - 11:46PM

Re: Norton needle jet

You're welcome to it Ian, it's one of the special oval orifice type (a bit like racing Honda pistons !)