Question about Honda CBR 125 R Motorcycles

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Honda CBR 125 R will not start

I have HONDA CBR 125 R, and the problem is it won't start. I turn on the key and the neutral light is on but it won't start so we decided to push the bike in order to start but unfortunately, it did not. what is wrong with my bike? can anybody help me?

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  • Honda Master
  • 39,945 Answers

Hi, Grass and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the enrichner.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. Fuel injectors stuck open.
13. 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 cursory 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.
14. 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.
15. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
16. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections loose, or connected to the wrong cylinders.
17. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
18. Faulty neutral, clutch lever, or kickstand safety switch.
19. Faulty fuel pump or fuse or relay.
20. A stuck bent or burnt valve.
21. Tilt sensor needs a reset.
22. Security system not disarming alarm needs a reset.
23. Check for engine trouble codes.
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.
cbr125 wont start
What Do Check When My Motorcycle Won Start Honda Shadow Forums Shadow...
Honda CBR125R Owner Manual service
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR125RW Owner Manual

Posted on Jun 19, 2017

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 2336 Answers

SOURCE: fuel petcock

The petcock is what the fuel flows through when it comes out of the gas tank. It probably includes: * A switch with positions for On, Off and Reserve. * A fuel line going to the carburetors. * A vacuum hose attachment which attaches to a carburetor which tugs on a rubber diaphram to let gas flow through. * An overflow/drip valve from the vacuum area. It's located right under the tank on the rear/left side.

Posted on Nov 10, 2008

  • 2 Answers

SOURCE: honda cbr 600 rr 2005 fuel tank removal

I had an 07, I had to remove the lower and side fairings and then the bolts are visible, dont just lift it up because wires and the fuel line will be connected and tight. When you lift it, lift easily so you dont just rip everything, you should be able to lift it high enough to disconect the wires without damage.

Posted on Feb 20, 2009

robotek
  • 1512 Answers

SOURCE: Rebuilding a Honda 2004 CBR 1000 RR Engine I just

Hi Paul,
You can download a copy of the entire manual, torque setting, head stud pattern, and every other usefulbit of info from here. Godd luck with the rebuild, let me know if you have any dramas with the manual. Cheers. 
regards robotek

Posted on Apr 08, 2009

  • 2 Answers

SOURCE: my honda cbr 400 rr nc23 keeps cuting out when hot

hi i had the same problem try checking your fuel pump there are contacts on the bottom of it under the black plastic if they look burned out then its the fuel pump if not try the fuel pump relay its located next to the pump on the side of the battery box bridge the black and black/blue wires to bypass it hope this helps

Posted on Apr 29, 2009

  • 35 Answers

SOURCE: free manual

honda site.. free manuals for download here..

http://hondatech.info/downloads/Moto/CBR/

Posted on Feb 15, 2010

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1 Answer

I have a CBR125R it has no spark. I changed the CDI, Stator, Pickup, Tilt Switch, but still nothing, please can you help


Hi, Wynand and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
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 CDI box.
5. Spark plug cables shorting or leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Honda CBR 125 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR125RW Owner Manual

Jan 20, 2017 | Honda CBR 125 R Motorcycles

1 Answer

Is the neutral light important when Im starting the engine? Or what i must to do to start my honda?


side stand sensor, clutch sensor. many will only start in neutral with side stand down and only in gear with clutch in, light shouldn't matter too much if just bulb blown

Feb 13, 2013 | 2006 Honda CBR 125 R

1 Answer

2005 Honda CBR 125 R won't start


Hi, Anonymous and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the enrichner.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. Fuel injectors stuck open.
13. 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 cursory 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.
14. 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.
15. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
16. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections loose, or connected to the wrong cylinders.
17. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
18. Faulty neutral, clutch lever, or kickstand safety switch.
19. Faulty fuel pump or fuse or relay.
20. A stuck bent or burnt valve.
21. Tilt sensor needs a reset.
22. Security system not disarming alarm needs a reset.
23. Check for engine trouble codes.
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.
2005 Honda CBR 125 Won start
What Do Check When My Motorcycle Won Start Honda Shadow Forums Shadow...
Honda CBR125R Owner Manual service
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR125RW Owner Manual

Jan 28, 2013 | 2005 Honda CBR 125 R

1 Answer

Honda cbr 125 F1 light wont come on


Hi, Anonymous for this scenario you will need your service/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 please click on the blue links below. Good luck and have a wonderful day.
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Mar 06, 2012 | 2004 Honda CBR 125 R

1 Answer

2010 Honda CBR 125 R hard starting


Hi, Craig_05 and the usual suspects are:
1. Spark plugs in bad condition or have an improper gap or are partially fouled.
2. Spark plug cables in bad condition.
3. Battery damaged or nearly discharged, should have 12.5 volts.
4. 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.
5. Throttle controls not adjusted correctly.
6. Water or dirt in the fuel system.
7. Water or dirt in the carburetor.
8. Intake air leak.
9. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
10. Enricher valve inoperative.
11. Engine lubricant to heavy (winter operation).
12. Ignition is not functioning properly (possible sensor failure).
13. Faulty ignition coil.
14. Valves sticking.
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.
CBR125 Won Start CBR Forum Enthusiast forums for Honda CBR Owners
What Do Check When My Motorcycle Won Start Honda Shadow Forums Shadow...
Honda CBR125R Owner Manual service
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR125RW Owner Manual

Sep 15, 2011 | 2006 Honda CBR 125 R

1 Answer

I have a 1999 Honda CBR 600 f4 and recently it won't start while in gear. Before, I could start it while I gear with the clutch lever pulled. Now it only starts while in neutral. Any ideas?


the neutral light, side stand switch and clutch switch are all wired together.
If the neutral light works.then check the side stand cut out works as normal, finally check the micro switch under the clutch lever, it should make a tiny click when the clutch is activated, also check it with a multi meter, follow the wires back to the plug and check the resistance goes from 0 to 1 with the clutch pulled

Jul 09, 2011 | 1999 Honda CBR 600 F(4)X

1 Answer

2008 Honda CBR 1000 RR Fireblade neutral light will not come on


Hi, Jbarbay02 and the usual suspects are:
1. Neutral light bulb burnt out.
2. Faulty neutral switch.
3. A loose bulb in the socket.
4. Faulty wiring from the neutral switch to the light.
5. Grounded neutral light circuit.
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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1 Answer

I tried to start my honda cbr125r this morning and it won't start lights come on as does the neutral light however when press the start button it won't start not even click Ben


starter soleniod is stuck, rape on it ,or fuse is blown..or it could be a stuck push start switch when you depressthe switch does the headlight go out ? if it does then this is normal operation

Aug 15, 2010 | 2004 Honda CBR 125 R

3 Answers

HONDA CBR 125R WILL NOT START WITHOUT BUMP START


I had the same problem with my 636. It turned out to be just a cable problem. Try to see if all the electric cables work correctly and connected.

Good Luck,
Elad.

May 11, 2009 | 2005 Honda CBR 125 R

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