Question about 1975 kawasaki Z1B

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1974 kawasaki 900Z1 carburater bowl over flow spilling gas

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The float is either not closing fully due to a bit of trash preventing it from fully sealing or the float is stuck open. Another possibility is that the float has a pinhole in it and no longer floats. Remove the float when you clean the carb then check it. It should be light as a feather and have nothing but air inside it. If the float is bad, it looks like Babbitt's has them. Please rate my answer. Thanks.

Posted on Sep 10, 2010


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Posted on Jan 02, 2017


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1 Answer

2003 Kawasaki Vulcan 800 classic has a fuel leak from the carburetor

Hi, Carlos and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
8. Damaged petcock diaphragm allowing fuel to flow through the vacuum line into the combustion chamber.
9. Contaminated fuel tank.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Sears mini tiller 10

it could be the bowl nut gasket or the bowl oring either could be dried out or in the case of the bowl oring could be pinched

Apr 03, 2012 | Craftsman Gas Mini - Tiller/Edger

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I have resently cleaned the carb since it have been sitting for a while, Have have put the carb back together and when I turn the fuel line on within a couple of seconds fuel begins to run out of the tube...

Something is holding the float needle open. A piece of trash, or the needle isn't in correctly or it may have gotten lost? The specific year and model of your bike was not mentioned so I chose the image below on a wild guess. The diagram is a 2004 Kawasaki KLX 125. Yours will be the same or very similar. In any event, this is the area that would be causing the problem. If you need parts, go to tombones49_269.gif

Aug 22, 2011 | kawasaki KX 250 Motorcycles

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My 2006 klx 250 won't fire, no fuel in float bowl, Tank is full, I drained the float bowl to try to get it to start and now no fuel is getting to the bowl

Check the filter screen on the fuel tap for blockage etc. Also check the tap for anything that may have lodged in it and blocking it. Check the fuel pipe too.

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1 Answer

OEM Carbs have what appears to be vacuum ports on the very bottom. What are these ports for and should they be leaking fuel?

they are the float bowl drains. You use them to empty the float bowl of gas ( water, gunk, debis). there is a screw on the bottom that acts as a valve to allow gas to flow through the hose attach fitting.

Aug 25, 2010 | 1977 kawasaki Z 650

1 Answer

Gas flows out of the carburater drain hose

Sounds like your carburetor floats are stuck to the bottom of the bowls. You can try to tap the carb bowl with a screwdriver and try to get them to pop loose, otherwise you will have to remove the float bowl (usually about 4 screws on the bottom of the carb). All you should have to do is pull it down about 1/4" or so until the floats pop loose and then put the bowl back on. This is pretty common on bikes that have sat for a few months, especially if you are good about draining the gas from the carbs when you're storring it.

Jul 13, 2010 | 2004 Honda CRF 150 F

1 Answer

No gas is getting from the gas tank to the carburater

Check in line filter, if none, pull the line off at the carb, if no gas flow, blow into the tank to remove the restriction. If the tank is full of rust, remove it, dump out the gas, fill the tank with sharp rock pebbles the size of peas to a 1/8 inch of the bottom. Shake the pebbles around in the tank till all the rust is loosened. Dump out the pebbles, wash the tank throughly with water and pour out on a white rag until all rust and pebbles are not visable on the dump rag. Dry the tank in the sun, then reassemble. Remove bowl on carb to acertain fuel flow to the bowl, and it is also clean. If motor still runs inconsistantly, drop the center nut again that holds the needle jet, this should clear the problem.

Jun 23, 2009 | Troy Bilt Pony 6.5 Hp Rear Tine Tiller

1 Answer

I need to reset the float levels in my carbys to stop the overflow on my 1974 Z1A Kawasaki

You describe a problem with either the float or the float-needle and seat. If the needle is not seating then the gas flows past it. If the float has a pin-hole leak, then it will fill with gas and sink.
On some bikes you can remove the carb bowl without removing the carbs. If so, slide the hinge pin holding the float to one side and remove. The float will drop straight down. Catch the needle since it is now loose. Unscrew the needle seat with a socket.
Clean all metal parts in carburator not get carb cleaner on any rubber part. Shake the float and listen for gas inside or see if it floats in water.
Test the needle seal in the seat by blowing gently thru seat. Needle must seat completly with very little pressure holding the needle in the seat.
Re-assemble with new bowl gasket if damaged. A carb rebuild kit ($35) might be available for 1973 carb and contains all new parts instead of cleaning. Kit might even contain new float and float adjust guide.
Avoid adjusting float level if re-using the old float. If using new float, temporarily install old and measure distance to carb body. Install new and match this measuremnt. Bend tang to adjust.

Good luck,

May 05, 2009 | 1974 kawasaki Z1A

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