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correct air slide 389?

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correct air slide 389?

Posted by john_day at Monday 11:01

is this the correct air slide[choke]

seems to be smaller than I remember....it's brass

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Re: correct air slide 389?

Posted by ian_soady at Monday 12:23

Looks OK to me. As long as it retracts fully so it doesn't protrude on WOT and is able to go down fully it should be OK.

Re: correct air slide 389?

Posted by George Phillips at Monday 16:14

Looks much like mine  - '55 ES2. George

Re: correct air slide 389?

Posted by john_day at Monday 17:26

Many thanks! I just thought it didn't restrict air flow much

Re: correct air slide 389?

Posted by rod_thompson at Monday 19:01
I don't know what the other two could see but the air slide appears to be missing! Only the brass guide tube is there. Here is a link to an illustrated parts list: http://amalcarb.co.uk/generic-389-monobloc.html Rod

Re: correct air slide 389?

Posted by ian_soady at Tuesday 10:56

I think you're right - I hadn't realised the magnification was so much! Of course the slide should fit quite nicely into the hole in the throttle slide that we can see.

Well spotted Rod.

Re: correct air slide 389?

Posted by john_day at Tuesday 14:25

a better photo, there is a guide and the brass slide is shown in the down position, but if memory serves me right, it is smaller than on previous bikes[mind you are going back 50 years!]

the slide goes down and does restrict the air a bit, but there is nothing to support it......it just hangs loose

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Re: correct air slide 389?

Posted by john_day at Tuesday 14:26

and a rule behind it

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Re: correct air slide 389?

Posted by ian_soady at Tuesday 16:13

The slide usually locates in that cutout in the throttle slide and is a sort of top hat section so I think what you're showing is incorrect.

You can see it on the link Rod posted.

What you have does look similar to the one I had on the 1931 Sunbeam I restored recently but TBH I can't remember exactly what that was like (Amal Type 74 carb).

Re: correct air slide 389?

Posted by George Phillips at Tuesday 16:26

Oops! My apols, John. Rod is quite right. I've just been down and shone a torch up the carb orifice and the air slide completely covers the width of the opening, stopping short at the bottom to allow some air through. Like Ian, I was misled by the scale. George

Re: correct air slide 389?

Posted by john_day at Tuesday 17:03

Many thanks again, I wonder how many other 'problems' I'll find before I get it on the road........ I bought it in good faith from a chap who said he had it running beautifully but because of ill health couldn't ride anymore!

still it will keep me out of mischief this winter.

And a very strange tank fitting!

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Re: correct air slide 389?

Posted by ian_soady at Wednesday 11:25

Funny, that's what the vendor of my ES2 said....... I have yet to seriously delve inside but am not encouraged by what seem to be metric Allen screws holding the rocker cover on.....

The tank fitting will provide a source for making new nuts.

Re: correct air slide 389?

Posted by Dan Field at Wednesday 16:31

It should run ok without the choke slide but you should remove the brass guide and cable and seal the carb top with a small nut and bolt.

Re: correct air slide 389?

Posted by Barry Carson at Wednesday 17:42

i removed my choke slide and associated parts and just siliconed the hole that was left it worked ok .

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