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No tickover adjusment

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shaggy
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No tickover adjusment

#1 PostAuthor: shaggy » Wed Nov 27, 2024 12:50 pm

Hi trying to balance my carb with a Morgan carb balancer the problem is the large tickover adjusting screw is out in fact it’s not touching and my tickover is too high and I can’t turn it down what have I done wrong.
Should I have set them up off the bike first.
[attachment=0]IMG_0960.jpeg[/attachment]
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Last edited by shaggy on Wed Nov 27, 2024 1:33 pm, edited 1 time in total.

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zed1015
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Re: No tickover adjusment

#2 PostAuthor: zed1015 » Wed Nov 27, 2024 12:55 pm

You likely have one or more individual slide adjusters set too high .

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Re: No tickover adjusment

#3 PostAuthor: Hard Road » Wed Nov 27, 2024 1:22 pm

have you got enough slack in the cables ?

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Re: No tickover adjusment

#4 PostAuthor: shaggy » Wed Nov 27, 2024 1:35 pm

[quote="Hard Road"]have you got enough slack in the cables
Yes

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Re: No tickover adjusment

#5 PostAuthor: shaggy » Wed Nov 27, 2024 1:41 pm

[quote="zed1015"]You likely have one or more individual slide adjusters set too high .[/quote]
I didn’t set them up before I put them on the bike maybe I need to remove them and do that. By slide adjusters I assume you mean the slotted screw with the lock nut on which I think I am right in thinking that’s what you adjust to balance the carbs unlike the later ones where you take the tops off this is a 75 Z1B.

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Re: No tickover adjusment

#6 PostAuthor: zed1015 » Wed Nov 27, 2024 3:54 pm

shaggy wrote:
zed1015 wrote:You likely have one or more individual slide adjusters set too high .

By slide adjusters I assume you mean the slotted screw with the lock nut on which I think I am right in thinking that’s what you adjust to balance the carbs unlike the later ones where you take the tops off this is a 75 Z1B.

Yes!

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Re: No tickover adjusment

#7 PostAuthor: shaggy » Wed Nov 27, 2024 5:23 pm

[quote="zed1015"][quote="shaggy"][quote="zed1015"]You likely have one or more individual slide adjusters set too high .[/quote]
By slide adjusters I assume you mean the slotted screw with the lock nut on which I think I am right in thinking that’s what you adjust to balance the carbs unlike the later ones where you take the tops off this is a 75 Z1B.[/quote]
Yes![/quote]
Is that yes to taking them off or yes about the slide adjsters

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Re: No tickover adjusment

#8 PostAuthor: warren3200gt » Wed Nov 27, 2024 5:40 pm

Yes to the adjusters with the lock nut.
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zed1015
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Re: No tickover adjusment

#9 PostAuthor: zed1015 » Wed Nov 27, 2024 7:21 pm

shaggy wrote:
zed1015 wrote:
shaggy wrote:
zed1015 wrote:You likely have one or more individual slide adjusters set too high .

By slide adjusters I assume you mean the slotted screw with the lock nut on which I think I am right in thinking that’s what you adjust to balance the carbs unlike the later ones where you take the tops off this is a 75 Z1B.

Yes!

Is that yes to taking them off or yes about the slide adjsters


Yes to the slide adjusters with lock nuts which are accessible without removing the carb tops and as can be seen in your pic the ones on #3 and #4 carbs are quite far apart regarding thread travel when there shouldn't really be more than half a turn or so difference unless there is something else throwing the vac readings out such as a manifold air leak etc.

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Re: No tickover adjusment

#10 PostAuthor: gray » Wed Nov 27, 2024 8:12 pm

put the vacuum balancer on it and see which cylinder has the least vacuum- that will be the carb slide that's too open ( and hence needing its adjuster adjusted)
gray

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Re: No tickover adjusment

#11 PostAuthor: shaggy » Wed Nov 27, 2024 8:23 pm

Can some one confirm for me tha all 4 carbs on z1B carb slide adjusters are adjustable there is not one that’s fixed that you adjust the others too

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Re: No tickover adjusment

#12 PostAuthor: zed1015 » Wed Nov 27, 2024 10:21 pm

shaggy wrote:Can some one confirm for me tha all 4 carbs on z1B carb slide adjusters are adjustable there is not one that’s fixed that you adjust the others too


Only early versions of the Z1 VM28SC carbs had a register carb which was number 2.
These have a plain cap instead of the screw and nut.
Later ones all had adjusters which yours should have.

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Re: No tickover adjusment

#13 PostAuthor: shaggy » Thu Nov 28, 2024 10:18 pm

All sorted now thanks for the help


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