Question about 2005 Honda Activa

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Fuel mixture adjustment of honda activa

Starting trouble

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  • Honda Master
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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.
https://itstillruns.com/adjust-honda-carburetor-5347552.html
Honda Activa Fuel Mixture screw Actual Adjustment and RPM Adjustment
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
http://www.partsfish.com/page/oem-parts-for-honda
Honda activa 2009 Owner Manual

Posted on Aug 28, 2017

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Posted on Jan 02, 2017

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SOURCE: need to adjust my honda shadow 500 vt carburator's

start by synchronizing your throttle plates. Honda calls the next step the "idle drop procedure". u need to know if you have fuel adj. screws or air adj. screws. fuel screws will be on engine side of carb slide, air screws will be on airbox side of carb slide. start leaning out mixture, (turn in fuel screw, turn out air screw. idle will increase so keep adjusting idle back to spec.after each turn if needed. Adjust about 1/4 to 1/2 turn at a time on each carb until there is no change in idle, then richen up mixture by one half turn. If u sync throttle plates first then follow this procedure, there should be no hesitation when you "blip" the throttle, and after revving it should return to idle smooth,

Posted on Apr 09, 2010

sisadsl
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SOURCE: air fuel mixture adjustment 04 honda 125 innova anf

the jetting should not be a problem, perhaps the air cleaner element is dirty or the element even if it looks ok sometimes needs a new one, the smaller motors often rely on the right intake vacumn through the filter for the carbs to work as designed

Posted on May 22, 2010

Testimonial: "yeah i did that and it made an instant difference.thanks again fixya. des obrien"

caroldon
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SOURCE: my honda activa doesn't start

First of all it is for sure that water had seeped into your electricals. So open the covers and wipe dry the coils, the wires to the plug, the wires to the ignition unit. make sure that there is no water in your fuel.remove the plug with the plug spanner supplied.Kick or use the starter to check for the spark on the plug ( which was also cleaned). If no spark then check again on the ignition system, the coils the contacts to confirm the fault. After a good spark is seen fit it back again and start. It must start for sure.Other wise repeat the process. I hope you get this right. Good day

Posted on Aug 04, 2010

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SOURCE: i have honda activa 2005

If you replace the silencer, you will restore the back pressure that is essential for 2 stroke engines to start and run smoothly.
Check out ebay

Posted on Jan 09, 2011

  • 738 Answers

SOURCE: My air /fuel mixture is

The base setting for the air mixture screw is 2 to 2

Posted on May 21, 2011

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