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Looking for Air Fuel Mixture screw for 1978 Kawasaki KZ650B, Mikuni Kogyu carburettor

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Looking for Air Fuel Mixture - 0618031.gif

Posted on Aug 04, 2010

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Bajaj Kawasaki Wind 125 air-fuel mixture 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.
basic carburettor adjustment tuning 4 stroke and how it works carburetor fuel adjustment in discover 125cc bike for idealing airfuel flow
Manual Kawasaki Bajaj Wind 125
OEM Parts for Kawasaki
http://mybikemanuals.com/kawasaki

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e




Apr 15, 2018 | kawasaki Motorcycles

1 Answer

2003 Bajaj Wind 125 idle adjustment


Hi, Suresh 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.
How to diagnose carburetor vacuum leaks on your motorcycle basic carburettor adjustment tuning 4 stroke and how it works http://mototh.com/files/kawasaki/Boss_175/Kawasaki-Eliminator-125-Service-Manual.pdf
Kawasaki BR 125 WIND 125 B2 B2 2005 Parts
Manual Kawasaki Bajaj Wind 125

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e




Mar 14, 2018 | 2005 Bajaj Wind 125

1 Answer

Mikuni bs32ss doing a carb sync. Where to attach vacuum hose and which screw to adjust. Even the "manual" doesn't identify which screw or where to attach hose. Pictures would be nice. Thanks


Each carb has a small vacuum port on the side above the float bowl, you adjust the idle stop screw to set the tune and sync the carbs. Leave the air fuel mixture screws alone.

Apr 12, 2017 | Mikuni Motorcycles

1 Answer

Diagram of mikuni carbs


clockwise for leaner mixture( it's really and air/fuel mix)

Jul 07, 2014 | 1990 Yamaha XTZ 750 Super T?n?r?

1 Answer

Air fuel mixture screw adjustment of spaco 17d carburettor


Problem with Cars & Trucks
Air fuel mixture screw adjustment of spaco 17d carburettor Open Question

Jul 01, 2013 | Cars & Trucks

1 Answer

1997 Kawasaki VN 1500 Vulcan Classic how to adjust the air-fuel mixture screw


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.
98 1500 Classic Mixture Screw Adjusting Kawasaki Vulcan Forum Vulcan Forums
Pilot Air Fuel Screw Adjustment Explained
Kawasaki VN1500 Service Manual
OEM Parts for Kawasaki
1997 Kawasaki Vulcan 1500 Classic Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e



Jun 08, 2012 | 1997 kawasaki VN 1500 Vulcan Classic

1 Answer

Carburettors seem to be running too rich. Can't locate air mixture adjusters, if that's the problem.


The air mixture settings dont often change by themselves, its usually a small screw under the carb, and is sometimes blanked over with a alum plug .
as the air filter gets old it can richen the mixture even if the filter looks ok and clean.
the carbs float bowls can flood due to dirt or corrosion as will require a carb overhaul.
If the air filter or exhaust has been changed from standard, this can mean rejetting, the air screws have their main effect at idle

Apr 05, 2011 | kawasaki GTR 1000 Motorcycles

1 Answer

Adjustable knob on the Mikuni BS26 Carburettor. Please advise what it is for.


there are a few adj. screws on carburetors air/fuel, sync, idle,
http://www.pdfee.com/search/mikuni+bs26+carburetor/page/2
this is a link to the manual it'll tell you everything you need to know. If you need anything else feel free to contact me
M.Woodring

Feb 12, 2011 | BMW R 80 Motorcycles

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