The CRF250L Owners thread

Discussion in 'Thumpers' started by joec63, Sep 4, 2012.

  1. itrack

    itrack Been here awhile

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    Sure, but I would like an open source ECU and a big bore.
  2. NJ-Brett

    NJ-Brett Brett

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    Even some systems on cars would pulse the injectors with a closed intake valve, the mixture just hangs around before being sucked in.
    Some bikes must do that as there are no cam position sensors and there is nothing to tell between TDC on the power stroke or the exhaust stroke.

    Any thumper without a cam position sensor would HAVE to do this.


  3. Ed@Ford

    Ed@Ford Long timer

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  4. MentalGuru

    MentalGuru Crazy Diamond

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    The computer can be programed to sense when the combustion stroke happens by monitering the increase in crankshaft speed. With the proper software it is possible to fire the injector at the corect time with only a crank sensor. Some cars do this when the cam sensor fails so they cam still run in limp in mode...

    :kumbaya
  5. Krono

    Krono Speed Junkie

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    There's only one O2 sensor, and thus at the exhaust port.
    The title is a little confusing where it's placed, though ...

    [​IMG]

    L
  6. Jinksy

    Jinksy - Jinksy

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    If I change the gear ratio from 14/40 to 13/43 will this give me better performance off the line?
  7. MentalGuru

    MentalGuru Crazy Diamond

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    Yes...

    :1drink
  8. Krono

    Krono Speed Junkie

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    About air induction, after having corcked it and disconnected the O2 sensor, following BDSB suggestions here http://bestdualsportbikes.com/dual-sport-bikes/2013-honda-crf250l/ and installed a dBkiller of my own, i had many stalling problems. That was cured by re-plugging the secondary air system and setting the first EJK parameter to 0, what got me rid of backfires too. Replugged also the O2 sensor, as i was there.

    Doesn't seems logical, since i probably leaned at idle, but that's what experimentation concluded in my case.

    Whatever .. i will try to experiment more with teh EJK setting (which you can emulate here http://www.electronicjetkit.com/demos/HPcurve.swf press mode, then + or -)

    L
  9. Krono

    Krono Speed Junkie

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    They just illustrate both AI and O2 sensor in this picture ... :D

    What is shown with the little arrows

    L
  10. StudMeyer

    StudMeyer n00b

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    Derp.

    New member, as I was recently granted permission to join from a fellow owner :lol3 Finally purchased a CRF after about 7,000 kms riding on rented machines in Thailand. Mine has 330 kms on it now. Going to get a new exhaust on tomorrow and new aluminum bar. Got other goodies coming over the next month or two.

    Look forward to reading about all the mods coming out for the bike.

    Here's a video I made in Thailand - footage from 2012. Stock CRF riding down doi suthep with a modified KLX

    enjoy
    <iframe src="http://www.youtube.com/embed/FcToMLUNrQw" allowfullscreen="" frameborder="0" height="315" width="420"></iframe>
  11. Krono

    Krono Speed Junkie

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    Welcome and congrats for the video. I can feel the pleasure of driving :norton
  12. gnath9

    gnath9 Been here awhile

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    13/42 and you won't have to mess with your chain.
  13. Jinksy

    Jinksy - Jinksy

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    This will help make it a quicker bike? Is this a hard process to do?
  14. Jinksy

    Jinksy - Jinksy

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    Thanks man, is this easy to do?
  15. MentalGuru

    MentalGuru Crazy Diamond

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    An impart driver helps to get the rear sprocket bolts out. The kind you hit with a hammer.

    [​IMG]

    Otherwise it's pretty easy.

    :freaky
  16. Krono

    Krono Speed Junkie

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  17. jstyck

    jstyck n00b

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    Great thread, took me a while to get through it all. I just picked up a 250L a couple weeks ago and love it.
  18. MentalGuru

    MentalGuru Crazy Diamond

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  19. Krono

    Krono Speed Junkie

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  20. MentalGuru

    MentalGuru Crazy Diamond

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    Wait, it will get someone... :rofl :rofl :rofl

    :lol3