28mm pumper help

Hi new member here looking for help
helping friend rebuild set of 28mm pumper carb , with both pumps , carbs came some what a part , like to know the jets size , and in the bowls are a weight and round steel ball under a c-clip , do all 4 bowls get these , and any other info on these carb will be helpful

bike is a 79kz 1000 stock motor ,pods , 4 to 1 exhaust ,

It's hard to understand what you just said about the bowls. Only one bowl has the pump. You say it has two? The ball bearing is a check valve/ball. If the carbs are flooding, it's the diaphragm/'s that is the culprit. Each carb has a jet that is controlled by the pump/'s. If it leaks, gas will be sucked into the carbs uncontrolled.
Steve

hey Steve . thanks for replay , yes has 2 pumps one square has rod on it and a triangle one on bottom ,
and do all 4 carbs bowls get a check ball ?

Can you post a pic?
Steve

Yes,...all 4 bowls get a check ball and c clip to keep it in.

For jets,...a good starting point would be 17.5 pilots and 117.5 mains.

Jim

According to the parts diagram on Kawasaki.com (see www.kawasaki.com/Parts/PartsDiagram/144219/1979/KZ1000-A3 ) all 4 carbs have the check valves. Ed

tbird wrote: hey Steve . thanks for replay , yes has 2 pumps one square has rod on it and a triangle one on bottom ,
and do all 4 carbs bowls get a check ball ?

It sounds like there's one accelerator pump --- two would be unusual.
The triangular setup is a vacuum sensor --- I think it acts to shut off fuel to the accelerator pump when the engine stops. The thing is disabled at the factory on some models (such as my 81 650).

Hi Thanks Guys , making little more since now , some great info, , if you come up with any thing else let me know ,

martin_csr wrote:

tbird wrote: hey Steve . thanks for replay , yes has 2 pumps one square has rod on it and a triangle one on bottom ,
and do all 4 carbs bowls get a check ball ?

It sounds like there's one accelerator pump --- two would be unusual.
The triangular setup is a vacuum sensor --- I think it acts to shut off fuel to the accelerator pump when the engine stops. The thing is disabled at the factory on some models (such as my 81 650).

+1 on the triangular vacuum sensor, my 80kz1000st has it but is dis abled as well per my manual and physical check

hi on these carb what size fuel line are you using from float bowls to float bowl , ?? 1/8 to small ,1/4/ to big .
he was wanting the blue fuel line , any one know of any thing that will work ?

Are you sure they are 28mm pumpers.
Only the 26mm 's had both diaphragms fitted.
The 28's had the triangular one blanked off.

tbird wrote: hi on these carb what size fuel line are you using from float bowls to float bowl , ?? 1/8 to small ,1/4/ to big .
he was wanting the blue fuel line , any one know of any thing that will work ?

3/16 seems like the logical size to try. Metric --- probably 5mm [(3/16) x 25.4 = 4.8mm]

And all 4 bowls should have a ball, weight & clip, and on the pump nozzles at the carb body gasket surface each nozzle should have an o-ring.