Question about 2003 Yamaha WR 250 F

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Electrical problem Yamaha wr250f 2002 Recently bought this bike ROAD LEGAL it has indicators and horn however i cant get them to work ive tested the horn off the bike on to another bike and it works fine and the indicator bulbs are ok wiring to the indicators are ok to. The bike does not have a battery Steve

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  • passion_flye Jan 28, 2009

    ok il have a look on the frame rail when i get back off work but i no there definatly wasnt a black box under the seat thanks

  • Anonymous Jan 29, 2009

    thank you all for your replies, i have not found a battery however i have had luck with the horn (nearly) i took the switch appart and noticed it was quite corroded i cleaned up the contacts and am now getting a faint horn noise when i press the button so im considering replacing the swtich. Thats if you can actually buy the switch as a seperate part, i noticed its not a case of disconnecting the switch from the loom becuase the wires come straight from the loom so im guessing id have to just re-solder them on to the new switch. Where would be a good place to buy Yamaha parts??
    Again thank you for your help!

  • joe May 11, 2010

    according to this pic, your bike is suppose to have a battery (#23 in the pic). see pic for location. look here to see if previous owner put in a large capacitor (battery bypass) instead of a battery.



    http://partsfinder.onlinemicrofiche.com/...



    or just the electrical:



    http://partsfinder.onlinemicrofiche.com/...

  • Patrick Dennehy May 11, 2010

    Near the side cover, perhaps? Find it yet? Battery, fuses?

  • Philip M. Alexander May 11, 2010

    Hey Steve,

    Ok quick question. Did you look under the seat for a small 1"X2 1/2" black box which houses the fuses? If not located there the fuse may be on the frame rail just below the seat.

    Good luck

  • Anonymous Mar 17, 2014

    the steering is either really loose or really tight and when i go between 10-15mph i feel unbalanced when i go around a corner. Ive dismantled the bike, and i cant seem to find any problems with it. What should i do?

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Without a battery,None of the electrics will work unless the bike is running.Start the bike to test.


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Posted on Jan 28, 2009

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10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
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Also the carbs need to be "synched" after they installed...all matched and in time with each other...check for vacuum leaks around the carb boots and cylinder head...check all the vacuum lines for any cracks or leaks....Check all your electrical connectors for signs of corrision, if they are dirty, clean them, they should all be shiny. Check your grounds, the main ground from battery to frame is a problem area... where it grounds to frame usually rusts and cant be seen until you remove it...A clean electrical circuit will provide you with a hotter spark at the plugs and improve performance.

These are good bikes, just take your time and go over it. She will be back on the road again in no time. I hope this helps---Good luck with your bike!

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