Carbs nearly right, need help dialing them in.

I had a terrible experience having my carbs rebuilt by a shop. It's all deataled here, if anyone's interested.

kzrider.com/component/option,com_joomlab...,3/id,169516/#169516

Anyway, after I took the bike back from the shop, we found the float levels off, there was still some crap in the carbs, etc. Also, the "rebuild" apparently didn't include the accelerator pump. The diaphram looked pretty bad, so I got a rebuild kit for it.

We got the float levels right last night using the "service" method wiredgeorge posted on here (thanks a million), and it now starts right up perfectly, even when cold, with no choke at all. It's also idling much better. Previously, it wouldn't idle smoothly below 17-1800, now it's smooth at 1200.

I do have a few questions about setup on the carbs though.

I tried uploading the image from Kawasaki.com, but, it says it's too big. If you follow this link, then click on "Carburetor Parts", though, you can see the diagram:

www.kawasaki.com/DefaultFrame.aspx?strCo.../VICHOOSEVEHICLE.ASP

Part #42, which, I believe the Clymer manual calls air bleeds, were screwed out about 2 1/4 turns. Is this the correct setting, and what exactly do they control?

Also, the shop that worked on it before ordered new Carb holders from Kawasaki. They are the correct right and left-hand models. He installed the outboard ones with the vacuum fittings facing upwards, and the inboard ones with those fittings facing downward. Is that correct, or, should they all be facing upwards?

Also, how do you adjust the pumpshot on the accelerator pump?

Post edited by: seanof30306, at: 2007/10/17 20:40

Post edited by: seanof30306, at: 2007/10/18 11:02

Depends what year, and what bike we are talking about, basically "pilot Screws" on bottom of carbs are set about 1 1/8 turns out, "air screws" located on upper side are set about 2 turns out. This is for a 650. Generally the vacuum fittings will be pointed down, but makes no differance. Can't help ya on the pump adjustment. Someone else will chime in for that. Good luck...

Thanks for responding. It's a '79 KZ650 B3

Post edited by: seanof30306, at: 2007/10/17 23:01

AS I understand it, the "pilot screws" on the bottom of the carbs adjust the pilot jets, which control fueling of the carbs at idle. Is that correct?

Also, what then, do the "air screws" control. The screws I'm thinking are the air screws are on the left-hand side of the carbs, at a 45 degree angle. Is that right?

Moderator, I screwed up and posted this in the wrong section. Can you please move it to carbs?

Thanks

Bluemeanie wrote:

Depends what year, and what bike we are talking about, basically "pilot Screws" on bottom of carbs are set about 1 1/8 turns out, "air screws" located on upper side are set about 2 turns out. This is for a 650. Generally the vacuum fittings will be pointed down, but makes no differance. Can't help ya on the pump adjustment. Someone else will chime in for that. Good luck...

Dude, I am losing my mind. I have looked everywhere, and cannot find the pilot jet screws. Can anyone help?

For reference

79KZ650 carb



Post edited by: Patton, at: 2007/10/26 17:10

Patton,

Thanks for responding.

I tried to post that diagram, but, it was too big. Can you tell me how you resize them?

Also, which is the pilot jet screw?

Thanks

The diagram shows both types of pilot screw designs.

If interpreting correctly, this means some 79KZ650's had side located pilot air screws (allows air into mixture, so screw in for richer and out for leaner) and other 79KZ650's (later models perhaps?) had bottom located pilot mixture screws (allows more mixture, so screw in for leaner and out for richer).

Most carbs I've seen have one or the other, but not both pilot adjustment screws on the same carb.

Am uncertain whether any carbs with side located pilot air screws had access to the screws limited or blocked.

Thinking the bottom located pilot mixture screws often had a "limiter" which allowed only a small adjustment either way, or a pressed in cap covering and blocking access to the adjuster screw. Such limiters and caps are often removed by owners.

OK, my carbs have the screws on the side, coming in at a 45 degree ancle (part #s 42, 43, and 44 on the diagram). Clymer's calls them air bleed screws. Is it these you adjust the pilot jets with?

Also, I understand you adjust the needle jets with a clip on the needle (PN 16 on the diagram). Clymer's says to start with the second from the bottom setting. We've disassembled the slide assemblies, and can only see one setting on the needle. Am I doing something wrong?

And, this post was moved to "Carbs", but now it's back in "Engines". Can one of the mods please move it to "Carbs"?

Sorry for the inconvenience.