Question about Honda CRF 150 F Motorcycles

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Failed emissions test on 2004 Honda CRF150

Arizona requires emissions testing on Dirt Bikes and ATVs. This bike starts easily and idles smoothly. However.....it failed the emissions test on Carbon Monoxide. It passed on Hydrocarbons. The bike has failed twice. After the first test, I realized that the choke had been half-way on during the test. Before the second test, I ran out the old gas and filled it with high octane. I also cleaned the air filter. I warmed the bike up for an hour before the test and made sure the choke was off. The second test was worse than the first. The hydrocarbon score was worse (but still passed) and the carbon monoxide was also worse than the first test. How should I adjust the carb and what screws should I turn?

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Hi this is not a permenant fix but before you take it for a emission test you wana make sure the engine is red hot ,clean oil,clean fuel these are the only things that could cause problems with a carbon test im not over familiar wiv the 150 but i assume there is no computer as these can sometimes make sensors tell lies if so then i would suggest looking at this aswell.
Hope i have been of some help

Posted on Mar 12, 2013

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Posted on Jan 02, 2017

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SOURCE: klx 110 2006 stalls when choke is pushed in

i'd say the carb is gummed up especially the pilot jet (#16158) in this pic of the USA carb. may have to remove the carb & bowl and then remove the pilot jet (w/ flat head screw driver) and clean out the tiny holes.

http://partsfinder.onlinemicrofiche.com/atlanticcycleandpower/Kawasaki_OEM/KawasakiDB.asp?Type=18&A=39&B=17&Action=O

-OR-

the carb slide is installed backwards (turned 180 degrees). its #16025 in the pic. i've done this before on my daughter's XR70 and Z50. you'll know if its this when you move the choke lever, RPMs increase and decrease.

hope this worked for you and was fast enough.

Posted on Feb 06, 2009

  • 3567 Answers

SOURCE: Tuning problems with 1985 Honda CR125

Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. Any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.


Please rate this solution. Thanks!

Posted on Mar 29, 2009

co7196
  • 3433 Answers

SOURCE: 2003 xr80 dirt bike, idle is super high

Yrs, carb needs cleaning

Posted on Jun 13, 2009

  • 6 Answers

SOURCE: 1994 GSXR 750 wont start

the carbs are proberbly blocked, you might have rust in your tank that will keep blocking, put an inline fuel filter in and get carbs cleaner, you also got a flat battery, give i little revs until it starts then adjust the idle

Posted on Jul 11, 2009

davesoucy
  • 148 Answers

SOURCE: cant keep idle at one rpm

First, check that you gas cable is not kink or something when you replace the tank. Also do you know the procedure to ajust the carb. Let the motor heat up and ajust the two screw. Does the choke keeps on, or have something broken. Something big is just on front of you. PAtience, you'll figure that out... It doesnt sound like something that needs to be clean here...

Posted on Aug 05, 2009

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How to adjust idle 2005 Honda 150 dirt bike


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.
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http://www.partsfish.com/page/oem-parts-for-honda
Honda 2004 CRF150F Owner Manual

May 29, 2014 | 2005 Honda CRF 150 F

1 Answer

2004 Honda CRF 150 F air/fuel mixture screw location


Hi, Anonymous for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere $10 you can download another one. 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.
2004 Honda CRF 150 air fuel mixture screw location Google Search
How to tune CRF150F dirt bike other basics
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Honda 2004 CRF150F Owner Manual

Apr 27, 2014 | 2004 Honda CRF 150 F

1 Answer

My 89 honda civic hatchback wont pass emissions. no check engines lights are on and no smoke coming out of the tail piple. it runs good. ive had hoses, pc valves and o2 sensor replaced. also had the...


There are procedures for adjusting the idle mixture and speed.
I would start with those. Perhaps that resllve both the idle issue and the emissions issue. See procedures at the link below.
Repair Guides Idle Speed And Mixture Idle Speed AutoZone com

If the car still fails the test after there adjustments, please post the test results.

Aug 07, 2017 | Cars & Trucks

1 Answer

2006 Honda CRF 150 F quit running


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery should 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. Failed 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. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, stator, magneto, ignition/electronic module.
7. Failed 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. Air/fuel mixture screw improperly adjusted.
11. Accelerator pump damaged or not working.
12. Water or dirt in the fuel system, carburetor or filter.
13. Restricted, blocked or kinked fuel line.
14. Fuel tank empty.
15. The gas cap is not venting properly or fuel tank venting system blocked.
16. A failed fuel pump, pressure regulator and or fuel injectors.
17. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
18. Needle and seat stuck closed in the float bowl.
19. Lean angle switch is faulty or needs adjustment.
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.
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https://www.partsfish.com/page/oem-parts-for-honda
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Jan 18, 2013 | 2006 Honda CRF 150 F

2 Answers

2005 Honda CRF 150 F no spark


Hi, Timcbair and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should 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.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty pulse coil.
8. Faulty CKP, CMP, or BAS sensor.
9. Faulty ignition switch.
10. Tilt sensor needs a reset.
11. Security alarm failing to disarm needs reset
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.
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May 27, 2010 | 2005 Honda CRF 150 F

1 Answer

I have a 2004 honda crf 100f. No start,no spark.Started,rode for 10 minutes & cut off at part throttle cruising on a trail.How do i test coil,etc..or is there a common problem on these? Own automotive...


Get yourself a good manual, knowing mechanics, you should be able to do the job relatively easily. There are no freebie manuals available for your model, but you are welcome to have a look in case I missed something.
http://www.carlsalter.com/motorcycle-manuals.asp

Jan 24, 2010 | 2002 Honda CR 125 R

2 Answers

My crf250 wouldnt start so put new shims in so correct spec now strugling to kick start and when it does front header pipe glows red any idea?


Possible causes are:
Insufficient valve tappet clearance. Re-check the tappet clearance on each valve. You can confirm this by checking the compression. Proper compression for your engine is 175~190 psi. Much lower than that indicates insufficient tappet clearance - or internal engine wear.
Fuel mixture too lean. This can easily be caused by clogged carburetor jets, from sitting. It only takes a few months on non-use for the carb to become plugged with fuel varnish. Also make certain there are no air leaks between the carburetof and engine. If you are running an aftermarket air filter, rejetting to correct a lean mixture is required.
Whatever you do - do not operate the engine in this condition or you risk damage to the cylinder head and valves.

Jan 02, 2010 | 2005 Honda CRF 250 R

2 Answers

Misfiring 2007 Honda VFR 800


I would say that your bike may be running a little lean. I usually replace the jets on all my bikes as soon as I get them as the emissions requirements mandate that the manufacturers pass stringent emissions tests prior to the dealer selling them. Some bikes wont even idle or run, especially off road bikes from places like California. and in these cases you must re jet it is a must! I even throw away or drill larger holes into my air cleaner cover.

Good Luck!
Geodesygold

Sep 22, 2009 | Honda VFR 800 Motorcycles

1 Answer

Bought a 2000 yamaha yzf600r which had a bad idling problem. Bike sat for a year. I cleaned the carbs, flushed the tank. Drilled out pilot caps and set the screws to 2.5 turns out as the original screw...


You can fail emissions on a bike in arizona ? Wow i thought california was bad....anyhoo let's get to your concerns....All those srews should be very close to the same setting....rule of thumb is start at 1and1/2 turns out on each screw, almost any gasoline engine will run at these setting then you can fine tune from there.....no wonder you had bad idling problems...Good luck to you friend....Tim

May 11, 2009 | 2000 Yamaha YZF-R6

1 Answer

Cranks initially


It starts because current flows easier in a warm battery. But any guessing about what the problem is needs to start with a charged battery, lead acid batteries need to be charged to 12.6v, if it won't charge to 12.6v, the battery needs replacing. It also sounds like your charging system may not be working right, which may have caused the battery to fail. With a charged battery check voltage at battery at 2500-3500rpm, it should read 13 to 14 volts, most bikes do not charge at idle.

Nov 10, 2008 | 1997 Honda CBR 600 F(3)V

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