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Amal 276 " Easily Starting Screw " drawings/ dimensionsThe screw may become

Submitted by richard_tool on Tue, 04/09/2018
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Several years ago at the request of a member in Kiwi land I measured and made drawings of the throttle screw on my ES2 276 standard carb - IIRC Nortons called it their " Easily Starting Screw " or some thing to that effect. It is simply a screw with an adjustable stop that raises the slide slightly to a predetermined fixed height for starting without input from the twist grip.

At the time I did this they were apparently hard to come by - at least " dahn unduh " - and so the drawings were of interest to make or have one made . Thinking that these might be of interest to some of the membership I contacted the gentleman in NZ to see if he still had them as I lost mine in one of several computer mishaps . Fortunately he did indeed still have them on record and forwarded them to me along with the good news that they are recently available again from Burlen/Amal.

For whatever it may be worth I thought I should post the drawings regardless . The screw may become unavailable again in the future or some may enjoy making one as a relatively simple machining project so here are said drawings . Perhaps the moderators of this forum might wish to archive them in some fashion - their call.

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Submitted by richard_tool on Tue, 04/09/2018

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And a photo of the subject - sorry for the additional post but I can't seem to include more than one attachment .

Lathes and mills are easier than computers when you are a dinosaur Luddite !

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Submitted by ian_hart on Tue, 04/09/2018

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The accessory manufactured by Burlen for pre-Monobloc carbs is called a T-bar throttle stop but it costs just shy of forty quid, so the self-help option could be doubly attractive.

Submitted by david_cooper on Tue, 04/09/2018

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Thanks for this. Useful if, like me, you have to leave the bike with a cold engine on tickover in order to close and padlock a gate behind you when you leave home.

Submitted by richard_payne on Tue, 04/09/2018

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The first reference that I've seen to these is on an Amal spec. card for the WD16H dated 4/8/39. It states; " For FUTURE use, the question of Thr. stop (Veloce type) has to be considered."

Like so many of Norton's good ideas, it was pinched from Velocette who used them pre-war...I don't think that Norton did until 1946 ?

 


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