Question about 2002 Honda CR 125 R

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2002 Honda CR 125 R fuel mixture adjustment@ - 2002 Honda CR 125 R

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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.
Cr125 carb adjustment for noob
2 stroke Carb Tuning Idle Adjustment Fix Your Dirt Bike com
Honda CR 125R 2002 Sevice Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CR125R 2006 Owner Manual

Posted on Nov 01, 2017

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SOURCE: whats the gas mixture for a 1998 honda cr80

well for a two stroke get a small container of 2 stroke oil and mix it with 1 gallon of gas.

Posted on Jun 03, 2009

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2004 Honda CR 125 R very high idle


Hi, Anonymous and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector.
10. Multiple carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
CR125 overly high idle at low idle settings help
Cr 125 2002 idling high
Honda CR 125R 2002 Sevice Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda Elsinore CR125M Owner Manual

Apr 17, 2014 | 2004 Honda CR 125 R

1 Answer

2004 Honda CR 125 R carburetor high idle


Hi, Anonymous and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector.
10. Multiple carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
CR125 overly high idle at low idle settings help
Cr 125 2002 idling high
Honda CR 125R 2002 Sevice Manual
OEM parts for Yamaha
Honda Elsinore CR125M Owner Manual

Jan 14, 2014 | 2004 Honda CR 125 R

1 Answer

2002 Honda CR 125 R cuts out when hot


Hi, Bob and the usual suspects are:
1. Severely discharged or a damaged battery must have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. Faulty alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Fuel tank empty
11. Fuel tank contaminated with ethanol sludge.
12. Water or dirt in the fuel system, or clogged filter.
13. Restricted, blocked or kinked fuel line.
14. Faulty fuel pump.
15. Faulty pressure regulator.
16. Faulty or clogged fuel injectors.
17. Lean angle switch is faulty or needs adjustment.
For more information about your issue and valuable "FREE" downloads that you need please click on the blue links below. Good luck and have a wonderful day.
cr 125 cutting out when full open throttal
CR125 FEW PROBLEMS WHATS MY CAUSE
Honda CR 125R 2002 Sevice Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda Elsinore CR125M Owner Manual

Aug 05, 2013 | 2002 Honda CR 125 R

1 Answer

2002 Honda CR 125 R idle adjustment


Hi, Anonymous you need to make sure you have no intake leaks by spraying some Brake Kleen, Contact Cleaner, Starting Fluid etc. around the intake manifold and seals, if the RPM's go up or down significantly then you have a leak that needs to be fixed before you can continue with the carburetor adjustment.
The engine should be at operating temperature with the enrichener off to set the idle between 950-1050 rpm. Turn the idle skrew clockwise to increase the idle speed and counterclockwise to decrease the idle speed. If you have access to your air fuel mixture skrew you may turn it as well, if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the air fuel mixture skrew clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back the skrew out 1-1/2 full turns to establish a starting point start the engine and check the idle rpm's and turn the idle skrew accordingly for 950-1050 rpm if necessary, turn the air fuel mixture skrew 1/4 turn at a time and let the engine settle for about 10 seconds, turn the skrew clockwise for a leaner mixture and counterclockwise for a richer mixture, you are seeking the highest rpm your air fuel mixture skrew can acquire without going past 3 full turns from bottom then resetting the idle skrew back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the air-fuel mixture skrew all the way in then your pilot/low-speed jet is too big and needs to be replaced with the next size smaller. Final adjustment should be made with a clean air filter mounted to the carburetor.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
2002 cr125 Idle adjustment
CR125 carb adjustment
Honda CR 125R 2002 Sevice Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda Elsinore CR125M Owner Manual

Mar 29, 2013 | 2002 Honda CR 125 R

1 Answer

My honda cr 250 idle's high when takin over. and before it runs out of petrol it rev's up on it's own.


The air/fuel mixture is Lean as opposed to rich. Adjust the air/fuel mixture screw clockwise in quarter turns until the idle normalizes. This screw can be found inbetween the carb and air filter. It should be a brass screw with a flat head (not cross or philips).
When you're almost out of fuel cab will go lean and therefore idle up.

Mar 01, 2011 | 2002 Honda CR 250 R

1 Answer

2002 Honda CR 125 R carburetor settings


Hi, Irideayamaha 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.
7. 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.
8. 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 please click on the blue links below. Good luck and have a wonderful day.
Cr125 carb adjustment for noob
2002 cr125 Idle adjustment
Honda CR 125R 2002 Sevice Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda Elsinore CR125M Owner Manual

Dec 21, 2010 | 2002 Honda CR 125 R

1 Answer

I have a 2002 CR 125. Runs great but has black fluid that comes out of tail pipe after running. I feel it is running too rich. What should the air/ fuel mixture screw be set at?


The mixture screw is used to get the transition from idle to throttle up smooth, and not to bog.
Sounds like your jetting is to rich, or too big. Read your plug as it's probably black. Then go smaller on your pilot jet, run it and read it again. Make sure you run 32:1 mix, and jet the bike to match this.

Dec 10, 2009 | 2002 Honda CR 125 R

1 Answer

Honda cr 125 1997 wont idle


Your carberautor is either gummed up or needs to be adjusted. Begin by going to an auto zone or similar store and gatting a can of carb. cleaner that gets added to your gas. Be sure to follow the instructions on how much you add per gallon. let that run through your bike for a while and see where you are. If cleaning the carb. doesn't hellp, then the carb. will have to be adjusted.

May 27, 2009 | 2002 Honda CR 125 R

1 Answer

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...

Jan 19, 2009 | 2005 Honda CR 125 R

2 Answers

GAS MIXTURE CR 125


i would mix it 50/1 it will make your bike run a whole lot better

Nov 28, 2008 | 2002 Honda CR 125 R

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