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Mixture adjustment screw settings - Motorcycles

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Hi, Walter I would love to help you but I can't believe the batteries in my crystal ball are dead and my mental telepathy headset is broken. I need the year, make, and model of your motorcycle please click on the word "COMMENT" below and provide this information in the box that will open and then click on the green comment box in the bottom right-hand corner after it posts I will receive an "ALERT" icon that will allow me to respond to your information. Good luck and have a nice day.

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How many turns in air screw?


turn the mixture screw all the way in then back it out between 1 1/2 turns to 2 turns
that will get the engine to idle from there set the idle speed with the throttle screw to desired idle rpms
now turn the mixture screw in slowly until you see/hear a fall in rpms
now screw the screw out until again you hear /see a fall in rpms.
half of the number of turns back in from in to out will be the desired air /fuel mixture setting
adjust the idle with the throttle screw if it has altered
you can repeat the procedure again to fine tune the mixture after adjusting the throttle screw

Sep 14, 2015 | 2006 Hero Honda Splendor+

1 Answer

Opel kaddet 1995 model. How do I adjust the


There are only two adjustments on a carburetor, the air mixture setting and the butterfly valve position setting. The air mixture screw is on the side close to the mounting flange, and has a spring behind the screw head to keep it in position.
To adjust it, look for the throttle valve screw which is also on the side, it ix the one that attaches close to where the throttle cable attaches to the carb. Turn the set screw down to let the car idle as slowly as possible. Now go to the air mixture screw. Turn it slowly first in one direction until the revs drop, then turn it out to the point where the revs are maximum. You might have to turn the screw back and forth until you find the best position. Now turn the throttle adjustment back to idle speed.

Aug 28, 2014 | Opel Kadett Cars & Trucks

1 Answer

Adjust carb idle


normal setting is achieved by turning the screws in till they stop then turn out 1 1/2 to 2 turns
if you have 2 screws set the same
start the bike and then adjust each screw in until you hear the rpms drop then turn out until you again hear the rpms drop the setting is 1/2 the number of turns beween in to die and out to die
do the same with the second screw and alternate until you have both screws set in the middle
you may have to adjust the idle setting as you do it as the fuel mixture will alter teh idle setting

Apr 26, 2014 | Suzuki VZ 800 Marauder Motorcycles

1 Answer

What is the factory setting for lowand high screws on 25cc craftsman blower


If the two screws are side by side, one is the high speed mixture screw and the other is the low speed mixture screw. To set the high and low adjustment screws, tighten the screws in until they stop, don't force the screw after it stops. Back each screw out 1 1/2 turns. The engine will start and run here if everything else is ok. Fine tune each adjustment screw by closing the screw off (CW) until the engine runs rough. Back the screw out (CCW) until the engine smooths out. Run the engine at full speed and adjust the high screw. Let off the trigger and adjust the low screw. Once the mixture screws are adjusted, you can turn the idle screw to adjust the idle speed. It can take some time getting it all adjusted.

Nov 20, 2013 | Garden

1 Answer

Honda gx160


Kescorpio56:
Check your throttle and choke settings. Something is causing the throttle plate in the carburetor to remain open or the governor is improperly set. I would reset the air/fuel mixture screws to one and a quarter turns out and back the idle screw all the way out. Make sure that the throttle cable operates the throttle properly and check the governor setting and reset the governor setting if needed. Start the engine and adjust from there. When the engine starts, adjust the idle screw until the engine idles. Adjust the fuel/air mixture screws for the best idle. Then run the RPM up and adjust the fuel/air mixture screws for the best run/idle combination. Don't forget to adjust the governor if the engine runs too fast or too slowly.

May 31, 2013 | Air Tools & Compressors

1 Answer

1996 Kawasaki ZZR 250 air/fuel mixture setting


Hi, Whiskers_57 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 do adjust the idle mixture
DIY Accessing and adjusting idle mixture screws ninjette org
Kawasaki ZZ R250 Service Manual Page 2
OEM Parts for Kawasaki
Kawasaki Ninja Owners Manuals

Apr 07, 2013 | 1996 kawasaki ZZR 250

1 Answer

IDENTIFY CARB SCREWS


The the two screws arew fuel screws so the more you unscrew them the richer the mixture gets, the screw nearest to the cylinder will be the L screw, this will adjust the mixture at idle and up to approx half revs, the other screw is the H screw and will adjust the mixture from half revs up to full revs, because this screw controls the max rpm you must never exceed the manufacturers permisable max rpm or the machine could seize, this should be set with a suitable tacho.

Aug 30, 2012 | Garden

1 Answer

Idle set 2004 fxdwg


Hi Anonymous, on the right hand side of the carburator there is an idle adjusting screw with a spring behind it, turn screw clockwise to increase idle counter clockwise to decrease idle. There is also an air/fuel mixture screw inside a carb body lug that may or may not be plugged with an aluminum cap that's about 3/16" thick. This cap can be drilled out to acess the air/fuel mixture screw. Turning screw clockwise will lean out mixture and lower idle, turning screw counter clockwise will richen mixture and raise idle. You need to balance the two adjusting screws to obtain an idle of 950-1000 RPM then back out air/fuel mixture screw 1/4 turn, snap throttle to confirm responce, you may continue to back out air/fuel mixture screw untill desired throttle responce is achieved, if you see black smoke coming out of exhaust you have gone to far and need to turn screw back in 1/8 turn at a time, final adjustment should be made with the engine at normal operating temperature. Good luck and hace nice day.

Feb 26, 2012 | Harley Davidson FXDWG - FXDWGI Dyna Wide...

1 Answer

I need to no how to adjust the air fuel mixture on a 1983 yamaha yt 125 3 wheeler


generally this is what i do. warm up engine. shut down and count the number of turns to gently seat the mixture screw. jot that info down. Then remove the mixture screw and spring. spray carb cleaner in the hole for the mixture screw, using the straw that comes with the can. this will ensure you have a clear circuit. Replace the mixture screw and spring and set back to original setting. Start engine. now you can adjust mixture. turn in or out to achieve maximum RPMs. blip throttle to make sure there is no flat spot at that setting. if it sounds good then back out the screw 1/8 more to have a slightly rich mixture. That should do it

Sep 16, 2010 | Yamaha YZ 125 Motorcycles

4 Answers

Carb adjustment


Hello:

>>The Following is the Instruction File for Setting the Air Mixture Screws. Any Input is Appreciated. The Procedure is the Same for 1 or 2 Mixture Screws, Just Use the Instruction File and Skip Over the Section with the Missing Mixture Screw ( Usually the H Mixture Screw).
>>Now Setting the Air Mixture Screws:
>>****Turn the Idle Air (L) and Main Air (H) Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Set the Throttle Full Open, Start the Engine.
>>Turn the Main Air (H) Mixture Screw Clockwise Until Proper Revs are Obtained. **Carefully Use your Finger and Move the Governor Arm to Rev the Engine (on Chainsaws and Trimmers Use the Trigger to Rev the Engine) Until you Reach Max RPMs (on Chainsaws and Trimmers, the RPMs are Not Set to MAX. Set to Max and then Reverse the Setting Screw 1/4 or 1/2 Turn. If the H Mixture Screw is Set too High; the Engine will be Starved for the Oil in the Gas and Damage the Piston and Jug/Cylinder) and the Engine is Running Proper at Full Throttle Up a Grade. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs.**
>>Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required.
>>Now Set the Idle Air (L) Mixture Screw so there is No Hesitation when Rapidly Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
>>If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy.
>>Thanks.

Respectfully

John

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