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carb again

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Wayne1960
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carb again

#1 PostAuthor: Wayne1960 » Wed Jan 08, 2014 1:49 pm

hi just about completed putting my carbs back together. Still need to get a replacement choke tube.
Also
got a carb kit from Keyster which comes with the needle jet which is item 45 on the parts list. I don't recall this being removed when I stripped down the carbs!!
does it simply slide over the jet needle 16 before the needle jet holder is screwed back in place????
Carbs are Mikuni VM26 SS
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.
Bike now finished what a joy!

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zed1015
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#2 PostAuthor: zed1015 » Wed Jan 08, 2014 2:02 pm

The needle jet is a light press fit in the carb body and needs a carefull light tap downwards from the venturi side to free it and the same procedure from the float side to refit
It is held firmly in place when the emulsion tube is screwed up.

Wayne1960
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#3 PostAuthor: Wayne1960 » Wed Jan 08, 2014 2:25 pm

Ok I sort of understand but some of the names you are giving the parts are new to me ie emulsion tube! is this the needle jet holder?

the jet itself is brass and has a flange a 3rd of the way up the shank so which way up does it go?

sorry to be a pain but I wont to get it right.

Thanks
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

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#4 PostAuthor: z1bman » Wed Jan 08, 2014 4:12 pm

if you look at the jet it has a slight chamfer on one end this faces the jet needle holder

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zed1015
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#5 PostAuthor: zed1015 » Wed Jan 08, 2014 4:28 pm

Yes! Emulsion tube = jet holder.
The jet is stepped and the smallest diameter (like a brass tube) sits in the carb body and protrudes slightly in to the venturi (carb bore).
As z1bman points out the widest end of the jet has a slight taper on it and the needle jet holder butts up against this to keep the jet seated in the carb body.

Wayne1960
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#6 PostAuthor: Wayne1960 » Wed Jan 08, 2014 4:39 pm

thanks guys I'm getting the picture. I will take a look at the carbs tonight. I'm guessing this can be installed from the float chamber and no need to remove tops.

I recon the originals must be still in there. if that's the case I will have to knock them out from the top.

If anyone has any pictures I would really appreciate it.
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

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#7 PostAuthor: kev edwards » Wed Jan 08, 2014 7:53 pm

Done these on mine knocked out from the top, and carefully replace just run around the top edge with a fine piece of wet and dry it takes off the sharp edge and stops the alloy being cut, piece of cake to do

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#8 PostAuthor: z1bman » Wed Jan 08, 2014 8:10 pm

spray some wd 40 into the jets. back of the tick over screw + snap open the throttle a couple of times + they might just fall out if they are not too bunged up ?

Wayne1960
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#9 PostAuthor: Wayne1960 » Thu Jan 09, 2014 8:29 am

Ok thanks all for your help I have it sorted! only thing I am looking for now is the brass choke tube. if anyone has one kicking about spare ?
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

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ADRIAN H
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#10 PostAuthor: ADRIAN H » Thu Jan 09, 2014 8:57 am

Wayne1960 wrote:Ok thanks all for your help I have it sorted! only thing I am looking for now is the brass choke tube. if anyone has one kicking about spare ?


I may have a spare, will look at lunchtime and come back to you.
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email - adrianhorsfield@live.co.uk

Wayne1960
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#11 PostAuthor: Wayne1960 » Thu Jan 09, 2014 9:50 am

Adrian

That would be very helpful
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

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ADRIAN H
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#12 PostAuthor: ADRIAN H » Thu Jan 09, 2014 7:20 pm

Wayne1960 wrote:Adrian

That would be very helpful


Wayne,

I have one off a set of Z1000 VM26 carbs you can have.

PM or email me your address details and I will put one the post tomorrow.
No charge.
👀 👀 👀

email - adrianhorsfield@live.co.uk

snotie1965
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#13 PostAuthor: snotie1965 » Fri Jan 10, 2014 1:50 pm

ADRIAN H wrote:
Wayne1960 wrote:Adrian

That would be very helpful


Wayne,

I have one off a set of Z1000 VM26 carbs you can have.

PM or email me your address details and I will put one the post tomorrow.
No charge.

Top Man ! this is why forums like this one are so good !!

Wayne1960
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#14 PostAuthor: Wayne1960 » Fri Jan 10, 2014 2:28 pm

Agreed
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!


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