Yamaha WR250R Mega Thread

Discussion in 'Thumpers' started by Sock Monkey, Apr 7, 2008.

  1. Attico

    Attico Wrong way 'round

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    I ran mine on an old honda on the running light circuit.

    They don't pull much usually
  2. TexaNate

    TexaNate Been here awhile

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    Hey all,

    First of all, great thread, I'm learning a lot. I've tried searching for this issue but I haven't been able to find the answer, so here goes...

    I bought my '08 WR250R used at 5,000 miles with the EXUP valve removed, airbox mod done and the complete FMF system (header, tailpipe and power programmer). The check engine light was on (continuously) but this didn't worry me since that's what happens when you do those engine mods.

    However, last I rode the light started flashing at a rate of roughly one second per flash. Then it went off entirely. Then it came back on again and went back to flashing.

    It happens in all kinds of situations, on-road and off, at all rev ranges, speeds and throttle levels. I don't know if the fuel pump was replaced but it works fine after nearly 5 years and 5,000 miles (I try not to run it low on gas). Everything else seems to work as it should. The computer throws no error codes, the engine gives plenty of power and the bike is a blast. I've changed the chain recently and after parsing all the competing scholarly sources on setting the slack, I think I have it set OK. Last oil change was 600 miles ago and I clean/swap the air filter every 3-400 miles (more if dirty/dusty). What does a flashing check engine light mean? Should I worry?

    Thanks for any wisdom you might offer!
  3. viper770

    viper770 Been here awhile

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    oh thats a easy fix just find some klx or a drz400 and sacrifice it to the WR god and all will be forgiven and check engine light should go away :evil
  4. shep546

    shep546 Been here awhile

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    Get the code checked? :deal
  5. DragonNester

    DragonNester Been here awhile

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  6. ggemelos

    ggemelos Been here awhile

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    I am in the process of installing Hot Grips heated grips on my bike. I am wiring it to a relay triggered by the license plate light. The resistance of each grip is about 10.5Ohm. They are wired in parallel which means they will nominally each pull about 1.15A, 2.3A total. That is not a huge amount, but enough that I would not want to tied in to an existing circuit.
  7. TwilightZone

    TwilightZone Long timer

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    >"I bought my '08 WR250R used at 5,000 miles with the EXUP valve removed...check engine light..."

    Sound like you didn't do the resistor jump in the EXUP controller end ($1 from Radio Shack)
    or buy the pre-made jumper end ($45 12 O'clock Labs).
    I believe there should be some info on WRRDualsport.com. Post back if you don't find it.

    BTW: I did the resistor jump, worked fine, no error code.
    Then I did the pre-made jumper which has a bit more electronics in it.
    I "felt" that the jumper made a bit of difference... but heck... dunno.
    Would be nice to perform that test on a dyno.
  8. oldtrucks

    oldtrucks Been here awhile

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    The flashing light may not be related to the EXUP removal. If you have the EXUP or access to one you can plug it back in and see if that clears the light. As mentioned there are several means to trick the system and turn off the light. 12 O'clock labs and Graves offer plug in modules that will defeat the light. Others have used diodes at a fraction of the cost.

    Without ruling out the EXUP first you're really guessing what the problem is
  9. pfy50

    pfy50 Professional nOOb

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    A rule of thumb in safety and electrical wiring. Half the Load or double the guage. Another words put only 1/2 the max load on the guage wire you have or use a guage wire that is double the max load you will put on that circuit(see link to chart) When you tie into an existing circuit compute your max load(total=existing load + what your adding) then as long as the amperage is 1/2 or less max load for the guage wire it is on your safe. If not use a separate circuit or replace the existing circuit with bigger guage wire. Here is a good chart to follow in figuring out what load a particular circuit can handle: http://www.powerstream.com/Wire_Size.htm
    ps. the taillight circuit is a 10amp line usually 16 or 18 guage wire so good to go with other loads noted in post #33602:evil
  10. TexaNate

    TexaNate Been here awhile

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    According to the fault codes sheet, The only reason the light flashes (rather than just "illuminating" continuously) is as a no-start indicator for 12, 19, 30, 41 or 50 - and the bike wouldn't start if one of those were the problem.

    I'll wire up an EXUP plug in module and I'll let you guys know if anything interesting happens.
  11. Recon_Buck

    Recon_Buck Candy-Assed Rider

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    Hey Inmates, I just stumbled across this thread, and I have many questions about the bike and some add-ons. I recently returned from the sandblast rally down in Cheraw, SC. Awesome Rally, and there's much about it on this website. I was the only WR250R out of the 48 bikes, and I came in second in the Light Class.

    Does anyone else race their WR250R here on the east coast? I'm looking for some other opporutnities to get involved.

    Here's a picture from the Sandblast. Great times! :clap
    [​IMG]
    2013sndblstrally0214copy_zps824bfebc by louisianazouaves, on Flickr

    Semper Fidelis, Buck
  12. Rapid Dog

    Rapid Dog bikes, booze, broads...

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    ...very capable!
  13. sieg

    sieg Long timer

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    What?
  14. UtahFox

    UtahFox Been here awhile

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    and I've gone from this...

    [​IMG]


    To this..

    [​IMG]
    [​IMG]


    Exhaust and an FI controller are on the way, and I'm working with a local suspension company to get that done. Should be a fun year :)
  15. ecarnell

    ecarnell Been here awhile

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    Looks great!
  16. burtonrider3889

    burtonrider3889 Been here awhile

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    Wow changing up quick! I love my white and blue for now. I will eventually like to go all white though.
  17. Jon

    Jon Adventurer

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    Buck great job at Sandblast! I just picked my WR250 a few weeks ago to run in the light class as well. I have competed in the car classes before but hope to run rallymoto at WV and Black River. Hope to see you there.
  18. indypup

    indypup ╭∩╮( º.º )╭∩╮

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    You selling the blue plastics? Mine are a little beat up. ;)
  19. UtahFox

    UtahFox Been here awhile

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    Nope. Who knows what'll happen to these once I start riding. I'm a very experience dirt rider, I may need them :)
  20. boardforever

    boardforever Been here awhile

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    What headlight/fairing are you using on there? Looks great!