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Yamaha yBR250 Electrical fuel pump is random functioning

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Check Ground. Run extra ground wire if necessary. Make sure all wire connections are tight.

Posted on Oct 16, 2013

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Im still looking for the fuel pump on my 2005 yamaha roadstar silverado, and fuse if any !


Here are diagrams of the 2005 Yamaha Road Star fuel systems.
First, select your Silverado in the box that says All Trim Levels.

Your 2005 Yamaha ROAD STAR revs your heart Genuine Fuel System parts from...

Once you're done with that, go back on your internet browser and in the box that says Fuel System, click that drop down and select Electrical System, unfortunately, I don't see any fuses in electrical system diagrams, the pump should be part of the electrical system, but I don't see that either in the electrical system diagrams.

Sep 16, 2016 | Yamaha Road Star Silverado Motorcycles

1 Answer

Idling speed


Hi, Anonymous the carburetor throttle shaft wheel has two cables the cable closest to the right side of the bike is the throttle cable and the one closest to the left side is the idle cable. Right about the middle between the two is the idle adjustment bolt it faces out towards the air filter end of the carb . The engine should be at operating temperature with the enrichener off to set the idle between 950-1050 rpm. Turn the idle adjustment bolt clockwise to increases idle speed and counterclockwise to decrease idle speed. If you have access to your air fuel mixture bolt you may adjust it as well if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the air fuel mixture bolt clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back it out 2 full turns to establish a starting point start the engine and check the idle rpm's and adjust the idle adjustment bolt accordingly for 950-1050 rpm if necessary, adjust the air fuel mixture bolt 1/4 turn at a time and let the engine settle for about 10 seconds, clockwise for a leaner mixture and counterclockwise for a richer mixture you are seeking the highest rpm your air fuel mixture bolt can acquire without going past 3 full turns from bottom then readjusting the idle adjustment bolt back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the air-fuel mixture bolt all the way in then your pilot/low-speed jet is too big. Final adjustment should be made with a clean air filter mounted to the carburetor. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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Yamaha YBR250 2007 Service Manual Download Manuals Technical
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Jun 21, 2014 | 2007 Yamaha yBR 250

1 Answer

Starting problem


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. 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 visit the websites below. Good luck and have a nice day.
https://yamahaclub.com/forums/topic/22523-ybr-125-starting-problems
WHAT TO DO IF YOUR BIKE WON START
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Apr 16, 2014 | 2006 Yamaha Ybr 125

1 Answer

Ybr125 07 rev counter erratic engine stalls occasionally


Hi, Anonymous 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 load test if necessary.
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. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
YBR 125 Losing revs and stalling when idle
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Mar 04, 2014 | Yamaha Ybr 125 Motorcycles

1 Answer

Is it possible to change km to miles on ybr250 odometer


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $15 you can download another one. 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.
YBR 250 Odometer
http://www.r6-forum.com/forums/51-how-tos/179202-how-change-odometer-speedometer-kilometers-too-miles.html
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Aug 26, 2013 | 2008 Yamaha yBR250

1 Answer

Convert kilometers to miles on odometer


Hi, Andrew for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $15 you can download another one. 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 YBR250 Owner Manual
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Yamaha YBR250 2007 Service Manual Download Manuals Technical
YBR 250 Odometer
http://www.r6-forum.com/forums/51-how-tos/179202-how-change-odometer-speedometer-kilometers-too-miles.html

Aug 26, 2013 | 2009 Yamaha yBR250

1 Answer

Yamaha ybr 250 reset diagnostic code


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $15 you can download another one. 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.
http://www.cyclepedia.com/manuals/online/cpp-203/fuel-system/self-diagnostics
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1 Answer

How erase fault code yamaha ybr 250


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, 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 links below. Good luck and have a nice day.
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1 Answer

Fuel pump yamaha ybr 250


Hi, Anonymous may very well be 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.
Yamaha YBR125 2007 Won start in hot weather otherwise fine
https://yamahaclub.com/forums/topic/22523-ybr-125-starting-problems
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May 07, 2012 | 2011 Yamaha yBR250

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