[jfcroni44]

On my 1977 KZ1000, I have the vacuum petcock - yes original to this one-owner bike. On the carbs, I have three vent nipples - one on carbs attached to cylinder 2,3,4. No nipple on the first carb. Is one of those three used for petcock vacuum? Or - do all three get vented to atmosphere, and I pick up the vacuum from one of the test points on the rubber boot connecting the carb to the head.

All of the test ports were previously plugged. I was thinking the carb port attached to the head on cylinder three was for the petcock. Picture shows two of the three ports.

 

[bweighmaster]

Those ports for syncing carbs . Vaccumn comes off manifold for petcock ....

 

[bweighmaster]

Your problem is going to be those pod filters ....

 

[WFO-KZ]

According to Partzilla hose #44 is for your fuel tap.

And it connects to one of these.

 

[jfcroni44]

Your problem is going to be those pod filters ....

How's that?

 

[jfcroni44]

So the vents (all three) just get vented through hoses that get routed to - under the seat... I think. I can use one of the manifold take-offs for the petcock. Strangely, none of the manifold take-offs were being used before. They were all (all four) capped off. I should have taken better pictures when I disassembled.

 

[WFO-KZ]

I must be missing something here. You say there are only 3 carb vents? Why does the 4th carb not have a vent?

Carbs are normally vented down by the swing arm, well away from the battery and wiring.

 

[bweighmaster]

Carbs all have vents ,,, he is looking at sync, fittings . Vaccumn for petcock comes off intake manifold ....as in lower pic .....

 

[jfcroni44]

Carbs all have vents ,,, he is looking at sync, fittings . Vaccumn for petcock comes off intake manifold ....as in lower pic .....

Thanks... I thought the lines going down were overflow. There are 4 of those. The three coming off the carbs in my Pic on the first part of the thread - i thought were vents. The four on the manifold - yes are manifold vacuum.

Here's a pic from the internet. Here it shows the port on carb 3, as a vacuum take-off.

Found this link for more info:

Carb swap?

 

[WFO-KZ]

If your carb has separate vents and overflows then yes, route the overflows down by the swingarm.

Looking carefully at your first photo it appears the nipple on the right is larger than the one on the left. If that is the case then maybe the smaller one is in fact for vacuum. But if you want to be sure of getting vacuum then remove one of the rubber caps from the 4 on the carb holders and use that.

For what its worth I don't think either of the two red arrows in the OP's first photo are pointing at sync fittings. The one on the right is clearly going straight to the carb body. I believe the 4 rubber-capped nipples that are attached to the carb holders is where you synch carbs on this bike. The OP's photo does not show the carb holders.

The last photo the OP posted confirms my suspicions. This photo shows that this bank of carbs has 2 vents (yellow) and one vacuum (green).

Kawi was making an awful lot of carb changes in 1977-78 and I think some changes were done within the model year which causes tons of confusion for anyone who has to work on these bikes.

 

[bweighmaster]

Easy to remember .. 1 sync. Fitting for each carb small ones ... , Fittings on manifold , vaccumn .. bottom are drain / overflow .. some carbs have 1 connected vent connected to each carb ... some have individual vents .....

 

[WFO-KZ]

Yes. I was mainly trying to clarify that the connections in the OP's first photo are not for synch.

 

[jfcroni44]

Thanks All