Question about 2007 Yamaha Ybr 125

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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.

I have 50cc Yamaha neos scooter, it not powerful enough as i need to travel to work on A roads which speed limit is minimum 40 mph. 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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  • 23 Answers

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

Posted on Jun 07, 2014

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: bike only fires once

Okay, let's have a look at it. Say Ahaaa.
The probable cause of the problem is not the spark. Get a fresh set of Stock NGK spark plugs, ground the plus to the engine, and check each cylinder for spark as the starter button is pressed for 3 seconds or so. I will wager that the spark is present.

The likely problem is the fresh gas was put into a very rusty gas tank. Bits of rust now inhabit your carb and are having fun plugging up the carb. Look at the gas valve. With a little luck there is a small bowl behind the valve. Remove it and tell me what you see in the bowl.

Posted on Apr 11, 2009

raffaiel
  • 209 Answers

SOURCE: how do i check that my fuel pump is working

the problem is your fuel pump check the connection if it is ok then you must change it.

Posted on Apr 17, 2009

  • 1 Answer

SOURCE: bike won't start 92 yamaha fzr 600

Sounds like the plugs are fouled out, I would pull them and make sure they're about the color of a paper bag. If they're all sooty and wet you most likely have a rich condition. I would take the carbs out and clean everything and pop in a new set of plugs. I have a 87 Fz600 that was acting up until I cleaned the carbs.

Posted on Apr 20, 2009

rtpflh
  • 546 Answers

SOURCE: I think someone hooked up fuel lines wrong. The

not that familiar w/Yamaha,but disconnected vacuum hoses may connect to fuel petcock at tank.I know Honda uses a system that only allows fuel to flow when vacuum is supplied.

Posted on Sep 26, 2009

yz-maniac
  • 127 Answers

SOURCE: so i was wondering i changed the spark plug on my

hi, the problem is that your bike is running to rich( to much fuel from carb to engine) so its the un-burned fuel mix that your seeing on your plug and thats fouling it out......now this is caused by either to rich of fuel mixture(you should be mixing 32:1) or you need to rejet carb so it delivers less fuel to engine... your carb has a jet in it and the # is stamped on it ( if you take the carb off and remove the bowl( 4 screws) you will see it,it will have an octagon shaped head.) for example if the # on it is 55 then you need to go with a 53 or 54...... also a good sign you need to rejet with a smaller jet is your bike will spooge(leak) a black oily residue from exhaust pipe and muffler( same residue thats fouling the spark plug.)

Posted on Sep 27, 2010

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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
Yamaha YBR 125 Turning over but not starting HELP
Yamaha YBR125ED 2005 Service Manual
OEM parts for Yamaha
YAMAHA YBR125ED Owner Manual

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
Yamaha YBR 125 Turning over but not starting HELP
Yamaha YBR125ED 2005 Service Manual
OEM parts for Yamaha
YAMAHA YBR125ED Owner Manual

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

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
OEM parts for Yamaha
YAMAHA YBR125 Owner Manual

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

I have a ybr 125 and the petrol is not getting through to the spark, i have checked the fuel filter and the fuel is reaching the carb and seems to be sitting in the bottom of the carb, i have taken the...


the fuel tank of a YBR uses vacuum, like DTs and WRsmake sure both hoses from the fule tank switch are operational as well as the by pass hose from the back of the fuel tank switch to the carburetor.

Apr 13, 2010 | 2006 Yamaha Ybr 125

2 Answers

Yamaha Neos 50cc water in carb


water from an air filter will not get into the carby bowl to block the jets
water in a carby comes from the fuel tank
if you are using e-mix fuel change to straight petrol as the ethanol in the fuel attracts water out of the atmosphere or the pump where you get the fuel has a water problem in the storage tank
next add methylated spirits ( around 20mm to a gallon) to the fuel tank to break down any water so that t it can go through the carby and be burnt in the combustion process best fix is to remove the tank and have it properly cleaned out, clean the fuel filter , have the carby properly overhauled and get the fuel from a different servo

Apr 07, 2017 | 2010 Yamaha Neos

1 Answer

I have a yamaha neos 50cc i havent used it for a year and I have just cleaned the main jet there was a little dirt in it.I cannot get it to start.Can you give me any tips on how to get it started.Bike only...


If you haven't used it for a year, I'd drain the gas and replace with fresh. Also since you found some dirt in the jet, I'd throughly clean the entire fuel delivery system, from the tank to the carb,,inline filter replace etc. Take the carb apart and soak in carb cleaner, then blow out, blow jets as well, and it wouldn't hurt to replace the needle valve seat. Next, make sure you are getting good spark. If you have the proper fuel/air mix and spark properly timed, your engine should start right up! Good Luck, Hope this helps!

Nov 07, 2009 | 2000 Yamaha XV 125 - S

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.
Yamaha YBR 125 will not start
Yamaha ybr 125 idle ajustment
Yamaha YBR125ED 2005 Service Manual
OEM parts for Yamaha
Yamaha YBR125ED Owner Manual

Jun 27, 2009 | 2005 Yamaha Ybr 125

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