Question about 1989 kawasaki ZX 10

1 Answer

Carburetor fuel flow

Rebuilt carbs. Replaced all o-rings and gaskets. When testing with a fuel "iv" bottle (No gas tank), the fuel gushed through and poured out of the airbox side on all carbs. I thought that's easy, I'll replace the valve pins. Now that they are replaced, it flows even worse. I have adjusted the float height to 13mm. While testing, I have not hooked up anything to the carbs. I am running it with only the bare carbs with the vacuum ports covered, no air box. I'm at my wits end to why the fuel is flowing so freely. The bike will run, but very rich. Smoke pouring out of the exhaust. Do I need to hook up all the vacuum lines for it to stop fuel flow and run correctly? What's going on?

Thank You!

Posted by on

  • johnesmith1 Nov 26, 2008

    Thank you for your input. The only thing left to do is replace the valve pin seats. I hesitate because they are about $30 each times 4, also when I blow through the fuel line and push the valve in and out, it does stop the flow. I tried adding 5mm to the float height to try and stop the flow. The valve almost does not open now and gas still flows. I'm thinking it may be a start up phenomenon. Gas is supposed to flow when it initially fills the bowl. So I'm going to leave the floats high and put it together and run the bike and see what happens. Is there a way to let you know what happens?

    Another thing I can do is test the carb on my EX500 (twin). I have a pair out of the bike on the work bench. It would be easy for me to test them to see if gas gushes out on initial bowl fill.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, to your queries:

  • hook up all the vacuum lines - yes or cover/plug all
  • to stop fuel flow - hooking up all the vacuum lines or covering/plugging them would be technically correct but will not stop the flooding/fuel overflow;
  • run correctly - with constant overflow/flooding, it will not run correctly.
To my knowledge, overflow could only be caused by:
  • faulty valve pins, worn out rounded pyramids, necked/indentations on the surface of the rounded pyramid, cracks (rubber type);
  • worn out inlet port;
  • dirt, sand, foreign object lodged against inlet port hole;
  • mis-adjusted floats;
Which would mean, go to do it all over again.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Posted on Nov 24, 2008

  • Louie  Role
    Louie Role Nov 26, 2008

    Perhaps you can defer if not cancel the purchase of the valve pin seats. Most floats I have worked on tend to stick/lock down on an empty bowl. On the first fillup, there would be delay before they would really float up to close/push the valve pins. One trick I often use is to partially fill each bottom half of the carb (the bowl) before attaching it back to the main body. This of course would mean that the screws would have to be tightened from below. Another is to gently knock on the carb's body while first turning on the fuel ****

    Posting back here would be do, the site would notify me that you have a new comment.


×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why is bike flooding and pushing gas out top over flow hose on carb after it runs for a min or two. Carb float been replaced still doing it.


Hi, Paige 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.
For more information about your issue please visit the websites below. Good luck and have nice a day.
My carb leaks fuel out of the overflow hose at the bottom of my carb
Carburetor is leaking gas out of overflow tube need help
Carburetor Carb Leaking Gas How to Fix Repair it Motorcycle Honda DIY..
.
Carbs leaking Here is how to fix it

Mar 28, 2016 | GAS Motorcycles

1 Answer

Why am I still getting fuel coming out of the over flow pipes ?


Hi, Nigel reset your float height to 21mm obviously thats not the problem and the other 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.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have nice a day. xlch@mail.com
How to adjust the Float Height on Carburetor Metric Harley and Asian
My carb leaks fuel out of the overflow hose at the bottom of my carb
Carburetor is leaking gas out of overflow tube need help
http://planetminis.com/forums/klx110-drz110-ttr90/180657-gas-coming-out-carb-overflow-tube.html

Mar 23, 2016 | Motorcycles

1 Answer

Oil leaking


Defective fuel shutoff valve. Some can be rebuilt, others must be replaced. Use same kind if replacing.
Stuck float in carburetor. Does it run good?

Apr 01, 2014 | 1988 Honda NSR 250 MC 18 SP-R

1 Answer

How to empty gas tank


Pull gas line from gas tank to carburetor/injector/throttle body.

If carb, turn on petcock, allowing gas to flow into a gas can.
Remove gas cap to improve/increase flow.

If injected, turn on ignition to cause fuel pump to turn on, flowing fuel under pressure into gas can.

Oct 28, 2013 | 2011 Aprilia SR 50 R Factory

1 Answer

If I remove a yics plug from one side and prime with fuel, the engine will start and idle until prime is burnt. Why will fuel not flow. New tank, new peacock, rebuilt carbs, new gas


Hi, Burns193 always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
not getting gas into carbs
Thread 1992 sl 650 carbs not getting fuel stumped
Yamaha XJ750 Owners Workshop Manual
OEM parts for Yamaha
http://www.carlsalter.com/pdfs/Yamaha_XJ600SK_Owners_Manual.pdf

Apr 20, 2013 | 1982 Yamaha XJ 650

1 Answer

I picked up a 79 cx500deluxe and it had been setting for 7 years under a taro. i drained the tank cleaned it out and the carbs seem to be fine in that as far as i can see there is no real tarnish or...


One carburetor is fed by the other carburetor. There is probably some blockage in the crossover pipe between the carburetors. You will probably have to take the carburetor rack off and split the carburetors apart to get proper access to the crossover tube, unless you can figure out how to clean out the crossover with out separation. You will need to replace the crossover pipe o-rings if you split the rack. They are only available in expensive Honda carburetor gasket kits. You may be able to purchase the o-rings separately out of a K&L Supply carburetor o-ring kit if your local dealer has one. Other wise an auto store may be able to match up the fuel proof o-rings.

Jul 23, 2011 | Honda CX 500 B Motorcycles

1 Answer

I have a 1993 XR 600. I was recently riding and I noticed the bike started stalling. It wouldn't idle and then started noticing that it started leaking gas out of a little rubber black hose. Then the bike...


Yes, your carburetor needs to come off and be disassembled and put into a carburetor solution and soak for at least 2 - 24 hours depending on how bacd it looks when you take it apart.
Then rinsed with water and then blown out with compressed air, in every orfice in the carb body and jets

Reassemble and she'll puurr like a kitten again and have great response, run like new.
Ever since they have been putting ethanol in the gasoline, i've been doing a lot of carb cleanings.

Your gas tank will get a build up of ethanol residue that turns thick, it eventually clogs up petcocks and fuel filters and the little holes in the sides of the carb jets.
Soaking them brings them back to life without scratching, soak everything taken out of the carb except o-rings, gaskets,and float. Then soak the whole carb body and all the jets.

So i would suggest that when you do the carb clean, you drain the old gas out of the gas tank, and start off with a fresh tank of gas, and a new fuel filter.
You can also add seafoam to your fuel and this seems to help prevent corrosion of the ethanol.

Nov 30, 2010 | 1993 Honda XR 600 R

2 Answers

My 1996 yz250 will run and idle. But not open to full throtal


Change plug

check crank seal (air side)

check correct fuel flow

rings ?

Jul 14, 2009 | 2003 Yamaha YZ 250

1 Answer

Gas leaking out of tank from an o-ring


The part number you gave is for the o ring that is used for a gasket on the carburetor float bowls.
I seriously doubt that is the problem. I suggest removing your gas tank and air filter assembly, rigging an auxiliary gas tank and running the bike to see if there is a fuel leak between the carb body and float bowl. If you don't see it leaking there, that is not the problem.
I would sooner believe there is a problem with the float or float needle sticking causing the carb to over flow and show signs of a leak.
It is not impossible for that o ring to leak, it is just extremely unlikely.

Jul 10, 2009 | 2003 Yamaha V Star Classic

2 Answers

Engine filling up with gas


there is no way for fuel to get passed the rings right? So if you filled the head with fuel, it would just work its way down the exhaust pipe and out the back, just like its doing. The only way of getting fuel into the sump is; if you have seriously bad rings (it would be burning oil) OR if its getting through the breather system. I don't even think if the injectors were on full-time, it still wouldn't get into the sump... very strange. Are you sure its not coolant? A serious coolant leak can be completely unnoticeable from the outside, but catastrophic to the inside. __________________

Nov 10, 2008 | 1999 Honda CBR 600 F(4)X

Not finding what you are looking for?
1989 kawasaki ZX 10 Logo

389 people viewed this question

Ask a Question

Usually answered in minutes!

Top kawasaki Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4471 Answers

Angelo Stewart
Angelo Stewart

Level 2 Expert

224 Answers

yadayada
yadayada

Level 3 Expert

60769 Answers

Are you a kawasaki Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...