Question about 1990 kawasaki ZXR 750

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What is the air fuel mixture srew setting for a 1987 ZX750R ninja

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Generally there is no specific setting, however nearly all carby's default setting is one and a half turns out. Whatever "air" you are running the bike in will determine optimum setting for this. Altitude, humidity, fuel type, sparkplug range all play a small part in this. Trial and incremental settings is the only way without diagnostic bench testing equipment. Cheers.

Posted on Apr 23, 2010

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Having fuel issues with my 1999 zx9r, i have already cleaned entire fuel system, bike will crank if i put my hands over air intake on carb, any suggestions?


Hi, Michael # 9 and 10 are jumping up and down waving a red flag and yelling "PICK ME" otherwise the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
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Dec 07, 2016 | 2000 kawasaki ZX-9 R Ninja

1 Answer

On my 2003 ninja 250 the only way it starts most of the time is full choke, after the bike is warm I lower the choke and it does....the I have to let it set for a few minutes to restart it,


Hi, Pirate and the usual suspects are:

1. Fuel cap or fuel tank is not venting properly.

2. Fuel filter clogged.

3. Fuel line pinched or kinked.

4. Float needle and seat sticking.

5. Float level too low.

6. Carburetor bowl vent line clogged/blocked/pinched.

7. Idle adjusting screw set too low.

8. Air/fuel mixture screw set too lean.

9. Idle port, transfer ports, slow air jet clogged.

10. Slow fuel jet clogged.

For more information about your issue and valuable free downloads that you will need please visit the websites below. Good luck and have a nice day.

05 250 only runs with choke fully engaged

Ninja 250r Wont Rev or run without choke ninjette org

http://mototh.com/files/kawasaki/Ninja_250R/Kawasaki_Ninja_250R_FI-English.pdf

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Mar 01, 2016 | Motorcycles

1 Answer

What are 750 zl mixture settings 1988 model


That all depends on the jets and air fuel mixture screw settings

Jun 08, 2014 | 1987 kawasaki ZL 1000 A1 Eliminator

1 Answer

1999 Kawasaki ZX-6R Ninja correct air mixture screw setting


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://www.zxforums.com/forums/mechanical-technical/37527-setting-mixture-screws.html
http://zx6r.com/zx6r/4617-trying-tune-2000-zx-6r.html
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May 02, 2014 | 1999 kawasaki ZX-6R Ninja

1 Answer

1997 Kawasaki ZX-6R Ninja will not idle


Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
13. Faulty auto choke or wiring connection.
For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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http://www.zxforums.com/forums/mechanical-technical/40220-2000-zx6r-wont-stay-running-stuck.html
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Nov 26, 2013 | 1997 kawasaki ZX-6R Ninja

1 Answer

2004 Kawasaki Ninja 250R dies with throttle


Hi, Ixitjbixi and the usual suspects are:
1. Idle port, transfer ports, slow air jet clogged.
2. Idle adjusting screw set too low.
3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
9. Fuel line to carburetor kinked or pinched.
10. Fuel filter clogged.
11. Intake manifold leak.
12. The gas cap is not venting properly or fuel tank venting system blocked.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
15. Multi carburetors not in sync.
16. Faulty fuel pump or internal fuel line has pinholes.
17. Fuel injectors clogged or faulty.
18. Faulty throttle position sensor.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Mar 15, 2013 | 2004 kawasaki Ninja 250R

1 Answer

1997 Kawasaki ZX-9R Ninja will not idle without choke


Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
13. Faulty auto choke or wiring connection.
For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Jul 31, 2012 | 1997 kawasaki ZX-9R Ninja

1 Answer

Mixture srew setting dt 125


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
https://yamahaclub.com/forums/topic/32738-dtr-125-help-again-please
Idle mixture adjustment air or fuel screw adjustment
http://www.motogelnar.cz/manual/YAMAHA/DT125X_RE-05-Service_Manual.pdf
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Jan 07, 2012 | 2000 Yamaha DT 125 R

1 Answer

1997 Kawasaki ZX-6R Ninja carburetor adjustment setting


Hi, Terrytingle7 it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
1998 ZX6R Stock Carb Settings KawiForums Kawasaki Motorcycle Forums
http://www.zxforums.com/forums/mechanical-technical/37527-setting-mixture-screws.html
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Oct 18, 2010 | 1997 kawasaki ZX-6R Ninja

1 Answer

I have a 1987 gmc jimmy with a 5.7 litre fuel injection and it seems to be lack air or has to much i dnt know . and i want to know how to adjust my fuel air mixture


Unfortunately, most fuel injection engines don't have an adjustable fuel/air mixture by the technician.

The fuel/air mixture is controlled by a computer.

Jul 03, 2010 | 1987 GMC Jimmy

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