Question about 2003 Yamaha WR 250 F

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I have a Yamaha Jog and need to change the spark plug . Where is it located and is it straight forward as I am not particularly mechanically minded

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Your sparkplug is screwed into the top of the head which is located underneath the fuel tank.

Posted on Feb 04, 2010

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My 2006 yamaha jog only wants to run for a couple seconds


if its watercooled jog rr the most likely problem will be the haed gasket leaking,these mopeds always suffer from that the gasket leak water into the combustion chamber and it starts briefly then wets the spark plug up and causes the spark plug to short out killing the spark.other than that it could be. carburettor jet blocked or the float in the carb badly adjusted .if it is the gasket leaking make sure you replace it with. genuine one or you will have the same problem again soon.trust me been there done that im a doctor.

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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 $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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http://www.yamaha-motor.com/assets/service/manuals/2000/lit-11626-13-13_50.pdf
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1 Answer

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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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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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2006 Yamaha Jog R locating VIN number


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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thanks, what is the ECM

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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 $ 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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Hi, Muhabob 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 blue links below. Good luck and have a wonderful day.
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1 Answer

My Yamaha jog 2002 scooter 50cc, 2 stroke run rich puffing a lot of smoke in the mornings, it only does 60km for 5L of petrol. what do I need to do to get better performance on it. Regds, Omar


have your carb cleaned and balanced, replace the piston rings and decarbonize the block that should do it, and also you can change your spark plug just incase

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