Question about 2000 Honda CM 125 C

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Hi, my name is Mark and i am enginearing.I have a problem with one cm 125 honda ....the problem is the left spark,every 3 days is black and dont start this cylynder......i clean air filter,i clean carburator and replace the piston,the cylynders and the valves but nothing... what the problem?please help me

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Check your sprark to see how hot it is. it sounds like it is not hot enough to burn the fuel properly. (MAGNETO?)

Posted on Sep 08, 2010

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1982 honda CM 125 Custom runs on one cylinder.


Hi, Angela you need "FIVE" things in order for a cylinder to run properly:
1. FUEL: in order to validate your not getting fuel spray some starting fluid into the air cleaner and hit the starter button, if it fires up and runs for a few seconds then you know you have a fuel delivery issue. Multi carb banks should be bench "SYNC"
2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
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.
http://myfilestore.com/download.php?id=9c22edb1
honda cm 125 running intermittently on one cylinder
One cylinder not firing
http://www.historicmotorcycle.org.au/Honda/CD125/HaynesCD125.pdf
http://www.partsfish.com/page/oem-parts-for-honda
Honda CM250 Custom Owner Manual

Apr 19, 2013 | Honda CM 125 C Motorcycles

1 Answer

2000 Honda CM 125 C fork oil capacity


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 zero $0 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.
Honda CM 125 CC 82 83
https://cbf125rider.files.wordpress.com/2011/10/cbf125_specifications1.pdf
Honda Cm 125 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
http://mybikemanuals.com/honda

Apr 10, 2013 | 2000 Honda CM 125 C

1 Answer

2000 Honda CM 125 C weak spark


Hi, Mario67 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.
Testing Honda Coils and CDI boxes
How to diagnose no spark situation on motorcycle
http://www.guside.com/honda-cm-125-service-manual.pdf
https://www.partsfish.com/page/oem-parts-for-honda
http://mybikemanuals.com/honda

Feb 21, 2013 | 2000 Honda CM 125 C

1 Answer

2002 Honda CM 125 C only running on one cylinder


Hi, Martin you need "FIVE" things in order for a cylinder to run properly:
1. FUEL: in order to validate your not getting fuel spray some starting fluid into the air cleaner and hit the starter button, if it fires up and runs for a few seconds then you know you have a fuel delivery issue. Multi carb banks should be bench "SYNC"
2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
For more information about your issue and valuable "FREE" downloads that you will need for viewing and printing please click on the blue links below. Good luck and have a wonderful day.
Running on one cylinder
honda cm 125 running intermittently on one cylinder
Honda CB125 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB Owners Manuals

Nov 29, 2012 | 2002 Honda CM 125 C

1 Answer

2000 Honda CM 125 C wiring diagram


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 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.
2000 Honda CM 125 wiring diagram Google Search
Honda Motorcycle Wiring Diagrams
http://www.douglasdnn.com/honda/honda-cm-125-c-service-manual.pdf
https://www.partsfish.com/page/oem-parts-for-honda
http://mybikemanuals.com/honda

Nov 28, 2012 | 2000 Honda CM 125 C

1 Answer

2000 Honda CM 125 C timing marks


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 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.
2000 Honda CM 125 timing marks Google Search
How To Set Cam Timing
Download Geek Search Honda Cm 125 Motorcycle Service Repair Manual
https://www.partsfish.com/page/oem-parts-for-honda
http://mybikemanuals.com/honda

Jul 31, 2012 | 2000 Honda CM 125 C

1 Answer

2000 Honda CM 125 engine serial number location


Hi, Maxine for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 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.
2000 Honda CM 125 engine serial number location Google Search
Honda motorcycle Frame numbers and VIN Locations
http://www.historicmotorcycle.org.au/Honda/CD125/HaynesCD125.pdf
https://www.partsfish.com/page/oem-parts-for-honda
http://mybikemanuals.com/honda

Jun 26, 2012 | 2000 Honda CM 125 C

1 Answer

1982 Honda CM 125 C will not shift


Hi, Ste_13 and the usual suspects are:
1. Improper clutch adjustment or not disengaging.
2. Bent shift shaft.
3. Shift fork bent or seized.
4. Gear seized on the shaft.
5. Gear positioning lever binding.
6. Shift return springs weak or broken.
7. Shift return spring pin loose
8. Shift mechanism arm spring is broken.
9. Shift mechanism arm is broken.
10. Shift drum is broken.
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.
Gear problems on Honda CM 125 Custom with history
Wont Upshift into 3rd or 4th
Honda CB125S Shop Manual
https://www.partsfish.com/page/oem-parts-for-honda
HONDA SL125 Owner Manual

Dec 12, 2011 | 2000 Honda CM 125 C

1 Answer

2000 Honda CM 125 C valve clearance


Hi, Halid_69 for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 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.
http://hondacg125.awardspace.com/valve_clearance.htm
CG125 HONDA CG 125 VALVE CLEARANCE ADJUSTMENT TUTORIAL
http://www.aabdedah.com/honda_cm_125_c_repair_manual_download.pdf
https://www.partsfish.com/page/oem-parts-for-honda
Please Check First

Nov 01, 2011 | 2000 Honda CM 125 C

1 Answer

Ignition Coil for Honda 125 CM /84


The 12v coil on a 6v system will only give a weak spark at best. The coil in the photo should work very well assuming the wires are long enough. Any 6v twin coil should work. If you fit another coil and the bike has spark but will not start, swap the wires at the points. Don't purchase a condenser unless the old one has gone bad. If needed, get a 6v condenser matching the old one.

A “very helpful” rating for this answer? Thanks from Dallas Texas!

Jun 16, 2009 | 2000 Honda CM 125 C

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