Missing piece

Moto Rumi technical problems or solutions
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Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Missing piece

Post by Elie » Sat Jul 25, 2020 8:40 pm

In this picture i see a piece no 19. What is this? I miss this piece. The reason why my engine is not working properly and always getting too much fuel?

Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Re: Missing piece

Post by Elie » Sat Jul 25, 2020 8:47 pm

Sorry can't post the photo. It's a round piece on the side of the carburettor inlet

UHJ200
Posts: 559
Joined: Mon Aug 17, 2009 1:37 pm

Re: Missing piece

Post by UHJ200 » Sun Jul 26, 2020 11:41 am

Is your reference to part No.19 from the "Moto Rumi Servicing and Quick Reference Spare Parts Manual"? A copy of which Hugo was kind enough to place in the reference section of this Forum for me.

On page 20 (Petrol tank, Carburation and Exhaust System) of that document part No.19 is shown as a petrol filler cap, I rather think we need a little more information :!: :lol:

Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Re: Missing piece

Post by Elie » Sun Jul 26, 2020 1:30 pm

Catalogi ricambio carburators dellorto motovelco thans how tho pic calles ,
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UHJ200
Posts: 559
Joined: Mon Aug 17, 2009 1:37 pm

Re: Missing piece

Post by UHJ200 » Sun Jul 26, 2020 2:26 pm

I cannot get to my Tipo at the moment to check but if memory serves, (not the most reliable tool in the box), :oops: my carburettor has a different solid clip (part 17).

I suspect but cannot state for certain that part 19 is a split ring made from a material with some flexibility. I suspect its purpose is merely to provide something for part 19 to clamp onto without risking damage to the carburettor body proper.

On the up side I do have a NOS single part 50 sculling around . . . ;)

Ian Skinner
Posts: 554
Joined: Mon Aug 24, 2009 12:36 pm
Location: South Wales UK

Re: Missing piece

Post by Ian Skinner » Sun Jul 26, 2020 3:47 pm

Hi Dave

a short plastic tube, fitted in the carb outlet to ensure an accurate fitting to the manifold by accommodating the different joining diameters of the two items. Without this, an airtight fitting between the carb and manifold is impossible.

Ian

UHJ200
Posts: 559
Joined: Mon Aug 17, 2009 1:37 pm

Re: Missing piece

Post by UHJ200 » Sun Jul 26, 2020 4:20 pm

Well done that man :!: Makes sense. 8-)

Don't remember what was on my little red Formi but then that was back in the early '50's

Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Re: Missing piece

Post by Elie » Sun Jul 26, 2020 6:14 pm

thank you Ian is there any difference between the front and the back of the inner diameter? a kind of venturi or just for sealing

Ian Skinner
Posts: 554
Joined: Mon Aug 24, 2009 12:36 pm
Location: South Wales UK

Re: Missing piece

Post by Ian Skinner » Sun Jul 26, 2020 11:18 pm

No venturi, just parallel inner and outer surfaces.

Ian

Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Re: Missing piece

Post by Elie » Mon Jul 27, 2020 10:51 am

Were could i get that thing, Thanks

hugomez
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Location: Amsterdam
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Re: Missing piece

Post by hugomez » Mon Jul 27, 2020 11:00 am

Have a look at the next link. All those part that appear are for Dellorto UA carburetors

LINK: https://www.dellorto.co.uk/product-cate ... -ma-parts/

Greets,
Hugo
My little Formichino here: http://www.formichino.com/pictures1.html

Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Re: Missing piece

Post by Elie » Mon Jul 27, 2020 1:05 pm

thanks very instructive

Elie
Posts: 96
Joined: Mon Jul 01, 2019 11:02 pm

Re: Missing piece

Post by Elie » Tue Aug 18, 2020 6:49 pm

bought the plastic seal but there is too little play between carburetor and inlet, this seal is not necessary with this carburetor

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