jossey
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| posted on 8/10/10 at 01:59 PM |
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ZZR1100 more help needed. What is this?
 
its off my c model zzr 1100.
its an air tube i think but i have no idea where to attach it to.
it seems to spray fuel out of the front of the carb when i blow in it...
does help it start though when its flooding lol
dave j
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Charlie_Zetec
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| posted on 8/10/10 at 02:11 PM |
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Looks like a vent pipe to me? Think (and I'll soon be told if I'm wrong), it went to the airbox on the standard setup, so aim upwards and
vent through a filter of some description?
I stand to be corrected by anyone else more knowledgeable than I....
[Edited on 8/10/10 by Charlie_Zetec]
Artificial intelligence is no match for natural stupidity!
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Hellfire
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| posted on 8/10/10 at 02:12 PM |
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It is likely to be a breather that went to the original Airbox. Without knowing where it goes on the Carbs though it is a guess.
Steve
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r1_pete
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| posted on 8/10/10 at 03:34 PM |
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Its the vent for the diaphragms, as the vacuum causes the diaphragm / silde to rise, these allow air in under the diaphragm.
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matt_gsxr
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| posted on 8/10/10 at 04:52 PM |
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My old carbs (Mikuni's on GSXR1100) had two different spare pipes of the sort that you show.
One set was breathers, these let air out when the bowls fill up. I could get fuel out of these if I turned the carbs upside down.
The other set were the diaphragm vent things that r1_pete describes.
Both vent separately to the air ideally via something to prevent insects and such getting in. Not sure which you have there, but it doesn't
make much difference. You could put one of those after market filters on it, or route it into the airbox (never any real vacuum in there to make any
difference).
Matt
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cosmick
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| posted on 8/10/10 at 05:51 PM |
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These are float bowl breathers and they must breath atmospheric air neither pressurised nor vacuum. DO NOT blank them off. Ideally, they need to be in
an area that has still air. blowing down them will make the carbs run very rich hence the fuel spouting out of the venturi as you were blowing
straight into the float chamber.
If it can't be fixed with a hammer then its probably an electrical problem.
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jossey
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| posted on 9/10/10 at 05:24 PM |
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Thanks all :-)
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zilspeed
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| posted on 10/10/10 at 01:40 PM |
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On ZZR1100, these were to do with the ram effect.
At high speed without these, positive pressure would cause the mixture to go rich as the diaphragm was forced up under pressure and the needle opens
up the jet that little bit more.
These diverted some of the high pressure to the other side of the diaphragm. Only the engine's breathing affects the needel height with these
connected.
It is significant.
A bloke I know had huge grief due to not appreciating the need for this hose when he installed a ZZR1100 into his Hawke.
The car was made to run much much better after reconnecting this hose correctly.
It ran even better after they ditched them and fitted flatslides.
Ask minitici, I believe he may have been involved with the Hawke once it passed into Colin Graham's hands.
(I reckon I've got the pressure thing the right way round. Sorry if I haven't.)
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jossey
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| posted on 11/10/10 at 07:13 PM |
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thank you sooo much again people.
cheers
dave j
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