Yamaha WR250R Mega Thread

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

  1. jskateborder

    jskateborder Been here awhile

    Joined:
    Dec 16, 2014
    Oddometer:
    579
    Location:
    Arizona
    D4488982-0442-49FA-ACC8-C8A8046E7F90.jpeg Is this my fault (careless washing) or is this something others are seeing from weather exposure? The drain hole set level to the base of the plug well on the side opposite the kickstand seems less than thought out.

    Attached Files:

  2. BluePill

    BluePill AARP Slacker

    Joined:
    Dec 9, 2008
    Oddometer:
    8,824
    Location:
    Pensacola on the Redneck Riviera
    Pretty much standard. Doesn't seem to effect the operation of the spark plug.
    jskateborder and simmons1 like this.
  3. WileyRTW

    WileyRTW Wiley

    Joined:
    Jun 17, 2009
    Oddometer:
    546
    Location:
    San Diego, Ca
    So I kept at cleaning that injector over the weekend, and today had luck and now have a nice even spray pattern. Thanks for the help. Bike still doesn't start, but at least I know that is working. Hoping it is the fuel pressure regulator, otherwise I will start looking at wiring I guess. Just because it is cranking doesn't rule out wiring correct?

    I have a new battery, used it today to clean the injector and try and start it a few times, then tested it resting at 12.45, so seems fine. The bike is in neutral, and the kickstand is up, though I realize wiring issues could make this seems like it is working when it is not, the cranking again makes me think its ok.
  4. BluePill

    BluePill AARP Slacker

    Joined:
    Dec 9, 2008
    Oddometer:
    8,824
    Location:
    Pensacola on the Redneck Riviera
    The fact that it will start and run with an external supply of fuel says that the ignition system and the basic mechanical functions of the motor (compression, cam timing, etc.) are working OK.

    Focus on fuel delivery pressure and volume.
    eakins and WileyRTW like this.
  5. WileyRTW

    WileyRTW Wiley

    Joined:
    Jun 17, 2009
    Oddometer:
    546
    Location:
    San Diego, Ca
    Thanks, 1 more day till the pressure regulator is delivered.
  6. eakins

    eakins Butler Maps

    Joined:
    May 29, 2002
    Oddometer:
    36,170
    Location:
    Fort Collins, Colorado
    If that is the problem, It would be great to see it cut open and understand what ethanol is doing to funk these up.
  7. Ginger Beard

    Ginger Beard Instagram @motopossum

    Joined:
    Jun 24, 2008
    Oddometer:
    13,401
    Location:
    FLAT Lander
    A few more pics from my October ride.

    IMG_20191023_114419.jpg

    IMG_20191023_111810.jpg

    IMG_20191022_163112.jpg
    ProLeisure, ACR, drifteast and 9 others like this.
  8. Marylander

    Marylander Long timer

    Joined:
    Apr 23, 2012
    Oddometer:
    1,030
    Location:
    Frederick County, MD
    Anyone put a front brake caliper from another bike on a WRR? I'm making a permanent switch of my WRX to WRR since I've got a supermoto'd 690 that I prefer for pure road use. I just want to throw another caliper on there and am betting that lots of other nissin ones will fit. I expect the one from my xtrainer would do the trick but that hardly helps me out as I need brakes on both bikes. ;) I'm tempted to just buy a complete setup from a wrf or yzf and take a chance but figured I'd ask here first. Anyone know of any calipers from other bikes that'd work on this thing?
  9. ramkas

    ramkas Been here awhile

    Joined:
    Feb 18, 2007
    Oddometer:
    249
    Location:
    Kansas City
    When I put 2003 wr250f forks on my 2008 wr250r, I reused my original front brake caliper and its bracket. That being the case, I would think a person could use a brake caliper and bracket from a 03-04 wr or yz 250 or 450 f. You mileage may vary. I have not tested that.
    Border411 and Marylander like this.
  10. Marylander

    Marylander Long timer

    Joined:
    Apr 23, 2012
    Oddometer:
    1,030
    Location:
    Frederick County, MD
    That's enough for me. Brakes for wrfs and yzfs are a dime a dozen on ebay. I just ordered a complete 2003 setup. I did something similar on my ole 00 kx250 (putting a complete rm250 brake setup on it). Thanks!
  11. Border411

    Border411 Been here awhile

    Joined:
    Sep 24, 2017
    Oddometer:
    410
    Location:
    Northern Virginia
    But why?

    I will say I love my compete 2003 WR450F front end (YZ450 wheel)!
  12. ramkas

    ramkas Been here awhile

    Joined:
    Feb 18, 2007
    Oddometer:
    249
    Location:
    Kansas City

    I love mine too. Yz450f wheel and axle.
    Border411 likes this.
  13. Marylander

    Marylander Long timer

    Joined:
    Apr 23, 2012
    Oddometer:
    1,030
    Location:
    Frederick County, MD
    The wrx and wrr use different hubs so I can't just swap my wrx rotor onto the wrr hub. In moving to the wrr wheel and rotor I need a caliper to match. I'd just like to quickly move to a wrr setup.
  14. Yinzer Moto

    Yinzer Moto Long timer Supporter

    Joined:
    Jun 13, 2008
    Oddometer:
    36,377
    Location:
    Pittsburgh PA
    A caliper may not fix your problem. If the problem is the WRF rotor is a different diameter, then the mounts on the fork may be in a different location. You might need a caliper spacer to adapt to a WRF rotor.
    Border411 likes this.
  15. Border411

    Border411 Been here awhile

    Joined:
    Sep 24, 2017
    Oddometer:
    410
    Location:
    Northern Virginia
    It is better than the GoRace set-up that I had on the OEM WRR front end.
    Bitingdog likes this.
  16. speedtrials

    speedtrials Been here awhile

    Joined:
    Nov 24, 2010
    Oddometer:
    157
    Location:
    Toronto, ON, Canada
    You can get an adapter to run an X rotor on an R hub. I have one to sell if you want to go that route. I've never used it as I found a Warp 9 front rotor that is X size but fits an R hub. Anyways....PM me if you're interested.
  17. ramkas

    ramkas Been here awhile

    Joined:
    Feb 18, 2007
    Oddometer:
    249
    Location:
    Kansas City
    Same here, I still have the go race shock on but the WRF front forks are better. I think its the larger inner cartridge that makes the difference.
    Border411 likes this.
  18. Border411

    Border411 Been here awhile

    Joined:
    Sep 24, 2017
    Oddometer:
    410
    Location:
    Northern Virginia
    Yup...although I rebuilt the WR450F forks with "5wt" oil. Next time around, Im going to try some "3wt".
  19. mtntrails

    mtntrails Life is Short... Supporter

    Joined:
    Jan 26, 2006
    Oddometer:
    1,015
    Location:
    Mount Airy, MD
    Interesting... are WR250F forks plug & play in to the WRR triple clamps?

    How about the WRR wheel in to the F forks?

    Gotta say, I have been pretty happy with the GoRace Suspension front & rear. It's a huge improvement over stock.
  20. Marylander

    Marylander Long timer

    Joined:
    Apr 23, 2012
    Oddometer:
    1,030
    Location:
    Frederick County, MD
    I don't think the X rotor would survive one trip through a local rock garden. ;) Thanks though.