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How to adjust mixture on lx 50 2t

How many turns does it need to come out .after being fully screwed in ?

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  • 74 Answers

Run the bike start at 2 1/2 to 3 out turn in slowly untill the bike runs rough and then back off (out) slightly at that piont idle is set

Posted on Feb 23, 2012

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6ya6ya
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Posted on Jan 02, 2017

Thunder55
  • 318 Answers

SOURCE: fuel mixture screw

Begin by screwing the mixture screw in all the way until it stopps,,,but ONLY JUST STOPS,,,,,DONT FORCE IT,,,then look at the top of the screw slot,,and call that 12 oclock,,,now turn the screw out to you three full turns going through 12oclock,,that means 12 to 12 is one turn.

then start the bike,,,finish your adjustments now by slowley turning the screw outwards until the engine starts to misfire,,,at this point turn the screw back in one half to three quarters of a turn.Now you have the mixture set roughly.
For fine tuning,, you need to use a monometer while turning the mixture screw
Best of luck...

Posted on Jan 19, 2009

cape cod bob
  • 292 Answers

SOURCE: rich mixture virago xv250

http://www.stadiumyamaha.com/pages/parts/viewbybrand/2/Yamaha.aspx

look up your bike here and i think it is number 13 on the diagram. which looks like its right by where the throttle cable connects

Posted on Mar 24, 2009

  • 65 Answers

SOURCE: flooding problem need to adjust mixture screw to correct setting

is air filter clean and what is your elevation?

Posted on May 05, 2009

dmsr63
  • 2050 Answers

SOURCE: Mixture screw on Carb

I believe it is near the bottom, around where the float bowl meets the carb body.. You need a straight small screwdriver (Short) facing upward.

Posted on Jul 29, 2009

  • 149 Answers

SOURCE: need factory carburator mixture screw adjustments

2 and 3/4 turn from all the way in on th fuel screws..

Posted on Aug 30, 2009

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How to adjust a Quadra jet carberator on a small block Chevy.


Hello, It's been a long time since I have adjusted a Quadra Jet. Start the engine and bring it up to running temperature. Make sure the choke is fully off. At idle , turn the right hand idle mixture screw in until you hear or feel the engine start to miss. Back out the idle mixture screw 1/4 turn. Repeat procedure for the left hand idle mixture screw. Adjust idle speed screw to 800 RPM for auto trans in gear or 700 rpm manual trans in neutral.

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1 Answer

What is the adjustment screw under the throttle?


Hi Darren, 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. At the front of the carburetor on the bottom of the venturi bore 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. Start by turning gently the screw clockwise until it just barley bottoms out then back it out 1 3/4 turns. You need to balance the two adjusting screws to obtain an idle of 950-1000 RPM then back out air/fuel mixture screw 1/8 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. For more information about your question please visit the websites below. Good luck and hace nice day.
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1 Answer

Adjust air fuel mixture


Hi Wentzpatrick, 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. Good luck.

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1 Answer

How do you adjust ldle air mixture on 2002 dyna low rider


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. Good luck.

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1 Answer

How to adjust the air/mixture screw on a 25-4cc RYOBI blower vacuum


I start with the screw about 1 1/2 turns out from fully seated (turned all the way in) but be careful when turning it all the way in not to turn it too hard as you can damage the end of the mixture screw. This should get you close enough to fine tune it.

Aug 18, 2012 | Echo Garden

1 Answer

1999 Road King Carb Adjustment


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.

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1 Answer

I found the both comments useful, somewhere to start. For example first one tells where to start like 3/4 to 1 turn (counterclockwise) etc.. But neither one tells the story fully. Like when I start with Hi...


When you adjust the high speed mixture screw you need to have the throttle wide open. Adjust in or out to find the median point between too rich (out) or too lean (in). When you adjust the idle mixture screw, you adjust this at idle following the same principle for the high. The saw should "throttle up" without hesitation, which usually indicates a lean condition, so you would need to turn out (rich) to compensate for that. After you get both screws set, you can make the final idle rpm with the idle rpm speed screw. Do not confuse the speed screw with the two mixture screws. Hope this clarifies any confusion.

Feb 15, 2011 | McCulloch Garden

1 Answer

Need a manual or something I have a traxxas .15 stamped 2wd need to adjust the Carb it has 2 screws need to know which one does what and what would be a standard adjustment


There are actually 3 screws on the carb. The big one is the most important, it adjust the high speed fuel mixture. A good starting point is 2 1/2 turns out from fully seated. There is a small screw which is located right next to the air intake. This is the idle stop and should be set so that the engine idles smoothly. The third screw is located on the side. It is also small and it controls the idle fuel mixture. A good starting point for the idle fuel mixture screw is 1 3/4 turns out from fully seated.

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1 Answer

Engine dies upon acceleration after starting and idling


turn the high speed and low speed mixture screws right in[gently]then out 2.5 turns.start it up,screw the idle screw up till it will idle,then adjust low speed mixture screw in or out so you get the highest idle.keep lowering the idle so as you adjust the screw,it wont get it any higher in revs.so by now it should idle.next,open the throttle wide,and adjust the high speed screw until you get maximum revs..then,turn screw 1/4 turn out.that makes it slightly richer,cooling the plug with droplets of petrol.you dont want it lean.if it wont rev fully,check the fuel filter.they get dirty quite often

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1 Answer

1990 geo metro engine surges up and down when stopped..... prevous owner told me he turned the idle down. So, is the surging a direct result of idle adjustment or something else? ...and where is the idle...


hi sounds like your engine is surging due to incorrect mixture now your idle screw is on the thottle cable were it connects to the carb and the mixture screw is on the carb body as an approx guide turn the mixture screw fully in then out two and a half turns that should help but y may need to fine ajust later

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