Yamaha WR250R Mega Thread

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

  1. Reposado1800

    Reposado1800 Juicy J fan!

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    Thanks guys! That is what I was looking for. Sure is cool to be able to adjust the mixture from the dash.:evil Bike value just went up.
  2. bigdon

    bigdon Long timer

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    Running my stock WR yesterday afternoon. Ran about 4 miles at 1/2 throttle then hit highway back home. Running full throttle in 6th gear for about 1 mile then shifted to 5th. Ran at full throttle for about oth 3/4 to 1 mile and hot light comes on. I let of throttle to about 1/2 or less and hot light went out in about 30 seconds. I was running slightly uphill and the ambient temperature was 106f.
    Do I have a problem?
    I am going to check water level and fan this afternoon.
    Radiator fins are clean.
    What else?

    Thanks guys, going to Western TAT at end of month and would rather not worry about bike getting hot. I have run it hard many times with never a problem. Why now?
  3. GotMojo?

    GotMojo? Long timer

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    Question for those running a No-Toil Filter. I got one the other day for my WR250X, but noticed it's a bit different than other No-Toil Filters I've seen which have a hole in the filter and then part of the cage goes through that hole with a piece that holds the filter to the cage (see pic below). The one I got for my WR250X doesn't seem to have that though. There is a hole in the filter itself, but the cage doesn't have any provisions to "attach" to the filter. Is that the way yours is?


    [​IMG]
  4. Krabill

    Krabill Long timer

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    A lot of people remove the plastic shroud from behind the radiator. I have removed mine and my bike sees plenty of high rpm, slow speed, single track use in the Oklahoma heat and I have never had my temp light come on. You might want to try removing that while you're checking fluid levels and fan fuses.
  5. debaisley

    debaisley Long timer

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    I dont think the fan coming on at highway speeds would do anything for the cooling of the bike anyways, i was also going to suggest removing the shroud behind the radiator.
  6. DougZ73

    DougZ73 Fading off.........

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    I have a NoToil air filter and do not recall anything going through the filter( could be I am forgetting it). I use the stock cage in the inside and stock locking down mechanism on the outside. Shape of cage and hole in airbox holds everything snuggly in place.
  7. GotMojo?

    GotMojo? Long timer

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    Thanks. So you didn't use the black plastic cage that came with the No Toil? Any particular reason?
  8. DougZ73

    DougZ73 Fading off.........

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    If it came with one..I probably used it. I honestly can't remember if mine did or not. I could have sworn I just used the stock one..since I had to clean off the petrochemical based oil that Yamaha used. I am due for a cleaning soon..so I'll know for sure then and report back.
  9. GotMojo?

    GotMojo? Long timer

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    Thanks. I just thought it was odd No Toil put a hole in the filter if there was nothing to go through it and hold the filter on. If the filter moved around at all, dirt might be able to go through that hole, and that's why I was wondering if something was different about the cage I got with this filter.
  10. DougZ73

    DougZ73 Fading off.........

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    I'll be pulling bike out tomorrow night to get ready for weekend riding. I'll look into it then and see what I did.
  11. debaisley

    debaisley Long timer

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    the super-flo kit that you got comes with its own cage that you are supposed to use , if you just bought the regular no-toil filter you use the stock cage.
  12. SteveO

    SteveO ouch....

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    Ok, so aside from looking at the plug, how can we tell if the bike is running too rich or too lean?

    I have an FMF pipe, no EXUP and the FMF Fuel programmer.

    Through tip overs, and dumps, I've never had an issue starting, and the bike seems to run well on the highway and single track trails.....
  13. DougZ73

    DougZ73 Fading off.........

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  14. Crawdaddy

    Crawdaddy Navigate 2 Adventure

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    Heading to Bass Lake this afternoon to ride in the Stewards of the Sierra Fundraiser this weekend:

    http://www.dualsportmoto.com/boards/viewtopic.php?p=2488#p2488

    Bass Lake is STILL my favorite place to ride in CA......tough to beat riding at the edge of Yosemite......GIANT trees, lush forests/ferns, stream crossings, etc......

    Whiskey Falls:

    [​IMG]
  15. cinco

    cinco bageldog

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    Been there years ago - you're right just awesome. There was a real cool little General Store/Diner there - called "The Forks" I think? GREAT food and burgers!

    EDIT - Yep, here it is http://www.theforksresort.com/
  16. reddirtjoe

    reddirtjoe motorcycle addict

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    Let's Ride some red dirt!!.... NorthCentOklahoma
    I am trying to thin my herd. Will a wr250r replace a 04DRZ400s,99DR350and a 97KDX220? :ear
  17. debaisley

    debaisley Long timer

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    it will certainly replace the drz , and dr350 , if you race , keep the kdx , if not , WR is a fine trail machine.
  18. DougZ73

    DougZ73 Fading off.........

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    I went from a 2000 DRZ 400 to the 2010 WR250R, and have not looked back. IMHO, only thing the WRR really needed was a shock rebuild....if you do any hard style riding.
  19. HardWorkingDog

    HardWorkingDog Harvey Mushman

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    It's a combination of art and science; a bit seat of the pants "how's it feel with this change" plus dyno runs, exhaust gas and temp. analysis and experience.

    I did come across this very cool tool in Motorcycle Consumer News--an NGK air-fuel monitor. It's got a wide-band O2 monitor that'll work from 9.0 - 16.0 afr's, about $260. You'd need to drill and weld the sensor bung into the header pipe, but this seems like a pretty inexpensive way to figure out exactly what's going on with fuel delivery over the full range of throttle settings.

    http://sparkplugs.com/more_info.asp?AAIA=&pid=20509

    I'm no expert, but from others who are you're looking for afr's in the range of 13.0 : 1 for best performance, below the ideal 14.7 : 1 ratio...
  20. bhd1223

    bhd1223 Been here awhile

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    Just a note on the 14.7:1 ratio. I'm fairly certain this is the calculated ideal ratio because of the typical standard units used and there are 14.7 psi (pounds per square inch) per atmosphere. 14.7 psi : 1 atm

    So now onto my question. I just received my new bars and associated odds and ends but I noticed a problem. The inside diameter of the new bars are too small for the old bar end hand guard attachment. Am I supposed to remove the rubber sleeve for it to fit or find one slimmer? I'm going from the stock bars to Tusk Chub bars and use Tusk D-Flex hand guards. Maybe now is the time to spring for Cycras with a triple clamp mount? Will I run into the same problem with those?

    Thanks for any help you can provide with my dilemma.