Question about 2007 Yamaha Ybr 125

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

So i have purchased non runner Yamaha YBR 125 which been standing for two years. I have experience fixing bikes with carb, but I never had something with fuel injection system. After I got it in my yard I have took it apart cleaned tank, all hoses, filter, fuel injector,changed oil and it didnt start so I started narrowing down the problem, it creates the spark so I have looked in fuel feeding and noticed there is no fuel coming from tank to ejector. I took out fuel pump and connected to power and tried to start bike and once I turned ignition on it makes click noise and once I trying to star its not doing anything and gets a bit hot, can it be blocked? also I put some fuel inside fuel line from tank to injector and tried to start it just to see if fuel injector will work, but its not taking fuel in is that because the pump generates pressure or it could be blocked to? Thank you

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

Posted on Apr 12, 2014

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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

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.
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https://yamahaclub.com/forums/topic/22523-ybr-125-starting-problems
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Hot wire yamaha ybr 125


Hi, Anonymous for more information about your question and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
https://yamahaclub.com/forums/topic/35549-how-can-i-start-my-yamaha-ybr-125-with-no-key
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Nov 15, 2012 | 2007 Yamaha Ybr 125

1 Answer

Yamaha ybr 125 starting problems in hot weather


Hi, Mary and the usual suspects are:
1. Dirt or other foreign matter between float valve and its seat.
2. Float valve sticking.
3. Float valve and/or valve seat is worn or damaged.
4. Float misadjusted.
5. Float cracked, leaky or damaged.
6. Excessive "PUMPING" of hand throttle grip.
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.
https://yamahaclub.com/forums/topic/27520-ybr-125-not-starting-in-warm-weather
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Hy a have a 2007 yamaha yber 125 it starts first time but then cuts off after 10 seconds anyone know what this is am struggling

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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.
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Apr 23, 2012 | 2007 Yamaha Ybr 125

1 Answer

Fuel indicator not working


Hi, Rag_anu19 and the usual suspects are:
1. Blown instrument fuse.
2. Faulty sending unit.
3. Faulty wiring between sending unit and gauge.
4. Faulty ground or power connection.
5. Bad fuel gauge.
For more information about your question 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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Apr 20, 2011 | 2005 Yamaha Ybr 125

1 Answer

I have a 2010 yamaha ybr 125 G. My technician said that the stator is starting to weaken and lost its power. Is it advisable to have it rewind or purchase a new stator. I'm worried to purchase a new...


If the stator needs to be replaced, get a new one. Rewinding would cost you much more. Have a different shop check the problem. Stators usually last the life of the bike.

Mar 14, 2011 | 2007 Yamaha Ybr 125

1 Answer

Service intervals for 2009 yamaha ybr 125cc


1 service 600 miles 2 service 500 or 1 year and ones a year there after that hope this helps

Nov 04, 2010 | 2007 Yamaha Ybr 125

1 Answer

2005 Yamaha Ybr 125 hard starting and idling


Hi, Tomvarley92 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.
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Yamaha YBR125ED 2005 Service Manual
OEM parts for Yamaha
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Jun 27, 2009 | 2005 Yamaha Ybr 125

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