Question about 2007 Yamaha Ybr 125

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2007 Yamaha Ybr 125 fuel pump not working

Hi, I turn ignition on and neutral and engine light come on but thr usual fuel pump priming to not happen, the enginr light still goes of after a few seconds. bike does not start as no fuel being pumped. put new pump in and worked for a short while and same symptoms came back, any ideas please thanks simon

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  • Yamaha Master
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Hi, Simon_anthon the following is a systematic procedure for diagnosing fuel pump issues designed to keep "DRACHMA" to a minimum. If you need parts check with Amazon and eBay first to keep costs down.
1. If your pump does not turn on check the pump fuse and relay and all wiring including connectors for corroded, broken, or loose pins/sockets.
1. Normal fuel pump pressure is 3-5 PSI.
2. Check any rubber or plastic tubing for age-related pinholes by removing and plugging the ends that connect to the fuel valve and then turn on the ignition switch and watch for fuel streams exiting the pinholes, if any exist, replace tubing as necessary.
3. Check for a clogged a primary fuel filter that comes off the bottom of the pump to screen out big rocks and clean as necessary.
4. Check for a clogged secondary fuel filter that's outside if applicable by removing it from the system and replace it with a short splicing tube turn on the ignition switch and recheck fuel pressure if pressure increases to normal pressure you need a new secondary filter.
5. If all the above check out OK and the pump is not functioning properly then you need a new fuel pump.
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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Posted on Jun 11, 2017

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Posted on Jan 02, 2017

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SOURCE: the bike was stolen, replaced the ignition lock, now won't start

well it depends on what kinda of bike your talking about.like on my cbr600rr it has a tip over switch which wont send spark to the engine and you have to replace it.some bikes you can just reset the ecu.i would get a service manual and find out how to reset the ecu and also see if it has a tip over switch.

Posted on Dec 01, 2008

  • 66 Answers

SOURCE: wont start

check yor fuses in your fuse box.also check main fuse.

Posted on Feb 16, 2009

  • 1 Answer

SOURCE: 2005 yamaha r6 want start. New plugs,replaced all

my yamaha r6 will not start all im getting is clicking

Posted on May 08, 2010

  • 11800 Answers

SOURCE: 2005 road star silverado -

Most likely there is something wrong with the kickstand switch - have it checked. Then remove the pump and test it separately on the bench.
If both are good then you had a short in the wiring from the water - have the entire harness tested.

Posted on Sep 16, 2011

  • 827 Answers

SOURCE: 2008 yamaha r6 wont start i put in a new ignition now my fuel pump wont ingage and my neutral light wont come on for some reason my bike will not start or turn over what is wrong and how do i fix

Good Morning,. I found this for you.. worth a shot:

  • verify that the main fuse is not blown. It would be inside the starter relay. To locate the starter relay, follow the cable from the battery's + terminal;
  • if the battery and the main fuse checks good, then check the voltage on the red wire from the starter relay to the ignition switch;
  • do the same and check for the presence of +12 to the brown wire from the ignition switch to the CDI.
  • Best regards
  • Ck

Posted on Nov 02, 2011

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Not starting


Hi, Anonymous and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
11. 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.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and CDI box.
Spark plug cables in bad condition and shorting check for leakage in the dark, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty MAP, CKP, O2, TPS, sensors.
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box.
17. A stuck bent or burnt valve.
18. Tip over sensor needs a reset.
19. Check for engine trouble codes.
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.
Yamaha YBR 125 will not start
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Apr 16, 2014 | 2010 Yamaha yBR 125

1 Answer

Yamaha motorcycle


Hi, Anonymous and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
11. 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.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and CDI box.
Spark plug cables in bad condition and shorting check for leakage in the dark, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty MAP, CKP, O2, TPS, sensors.
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box.
17. A stuck bent or burnt valve.
18. Tip over sensor needs a reset.
19. Check for engine trouble codes.
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.
Yamaha YBR 125 will not start
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Apr 16, 2014 | 2010 Yamaha yBR 125

1 Answer

My Yamaha YBR 125 2007 not starting, it been standing for 2 years


the fuel pump is most likely seized from setting too long. fuel injectors could be clogged as well.

Apr 12, 2014 | 2007 Yamaha Ybr 125

1 Answer

My Yamaha YBR 125 2007 not starting, it been standing for 2 years, I have cleaned tank, all hoses, filter, fuel injector.


Hi sounds like your nearly there ,try swapping hose around ,I once mixed the in and out ,next did you take the carbs apart and clean ,also a small shot of wd 40 in to the fuel pump without hose connected then pour out ,from what I read sound pretty good kid best of luck

Apr 12, 2014 | 2007 Yamaha Ybr 125

1 Answer

Difficult starting YBR 125


Hi, Anonymous 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. Faulty fuel pump.
9. Intake air leak.
10. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
11. Enricher valve inoperative.
12. Engine lubricant to heavy (winter operation).
13. Ignition is not functioning properly (possible sensor failure).
14. Faulty ignition coil.
15. Valves sticking.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
Yamaha YBR 125 will not start
Yamaha YBR 125 won start
Yamaha YBR125ED 2005 Service Manual
OEM parts for Yamaha
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Jan 02, 2014 | 2006 Yamaha Ybr 125

1 Answer

Yamaha YBR 125 hard starting


Hi, Anonymous 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. Faulty fuel pump.
9. Intake air leak.
10. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
11. Enricher valve inoperative.
12. Engine lubricant to heavy (winter operation).
13. Ignition is not functioning properly (possible sensor failure).
14. Faulty ignition coil.
15. Valves sticking.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
Yamaha YBR 125 won start
https://yamahaclub.com/forums/topic/22523-ybr-125-starting-problems
Yamaha YBR 125 Service Manual
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Jan 14, 2013 | 2007 Yamaha Ybr 125

1 Answer

Ybr 125 is struggling to start


Hi, Ian before testing any electrical component in the Starter Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test because your battery may have 12.5 volts or more but little or zero amps causing the battery to be faulty and must be replaced, especially "AGM" batteries.
1. Spark plugs in bad condition or have an improper gap or are partially fouled.
2. Spark plug cables in bad condition.
3. Loose wire/cable connection at one of the battery terminals, especially the "NEGATIVE" cable, check it at both ends, coil, or plug between ECM or ignition module.
4. Throttle controls not adjusted correctly.
5. Water or dirt in the fuel system.
6. Water or dirt in the carburetor.
7. Intake air leak.
8. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
9. Enrichener valve inoperative.
10. Engine lubricant to heavy (winter operation).
11. Ignition is not functioning properly (possible sensor failure).
12. Faulty ignition coil.
13. 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.
Yamaha YBR 125 won start
Yamaha YBR 125 will not start
Yamaha YBR125ED 2005 Service Manual
OEM parts for Yamaha
YAMAHA YBR125ED Owner Manual

Apr 23, 2012 | 2007 Yamaha Ybr 125

1 Answer

Hi there. I have a Yamaha YBR 125 on an 07 plate. It's the fuel injected model. Its developed a serious and dangerous fault that I just can't seem to find an answer to on the Internet... When...


Hi, Shine_on_you and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or better and be able to pass a proper "LOAD" test if necessary your battery may show 12.5 volts or more but have little or zero amps and must be replaced.
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, 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. Fuel tank empty.
10. Fuel tank contaminated with ethanol sludge.
11. Water or dirt in the fuel system, or clogged filter.
12. Restricted, blocked or kinked fuel line.
13. Faulty fuel pump.
14. Faulty pressure regulator.
15. Faulty or clogged fuel injectors.
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.
2007 YBR 125 Electrical Fuel Injection Problem
https://forum.motorcyclenews.com/topic/54910/bike-cutting-out-while-riding
Yamaha YBR125ED 2005 Service Manual
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Apr 09, 2012 | 2007 Yamaha Ybr 125

1 Answer

My ybr 125 fuel injection system seems intermittent. When i turn the key and the yellow light comes on, i sometimes cannot hear the fuel pump priming, and then the bike will not start. Allways seems to be...


Hi, Bsacdivermar before testing any electrical component in the Starter Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test because your battery may have 12.5 volts or more but little or zero amps causing the battery to be faulty and must be replaced, especially "AGM" batteries.
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Check the 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.
4. Bank angle sensor needs a reset or is faulty.
5. FOB battery low or dead.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand or clutch pull in switch/sensor.
9. Security alarm needs a reset.
10. Starter relay, solenoid, starter have failed or circuit wiring faulty.
11. Starter armature or field coils have failed.
12. Main fuse or circuit breaker may be blown or faulty.
13. The electric starter is working but starter clutch has failed.
14. 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.
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Yamaha YBR125ED 2005 Service Manual
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Sep 01, 2011 | 2005 Yamaha Ybr 125

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