Yamaha WR250R Mega Thread

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

  1. scoprire

    scoprire Been here awhile

    Joined:
    Aug 10, 2008
    Oddometer:
    176
    Location:
    KY
    I've had good luck getting individual stainless bolts from http://www.desmoparts.com/ High quality bolts, great selection too. He has kits for some bikes, but a separate page for individual sizes.
  2. markk53

    markk53 jack of all trades...

    Joined:
    Dec 20, 2007
    Oddometer:
    10,338
    Location:
    Delaware Ohio
    In reading this, I had some thoughts since I've had to deal with metric hardware in a sideline project making cam chain tensioners. If you did some digging might find the 8 is a rounded M8-.075 fine thread pitch. They do two fine pitches, M8-1.00 and M8-.075 threads per millimeter. But I'm guessing. The coarse 8mm thread is M8-1.25 threads per mm.

    Here is a link to the ISO charts

    I buy bolts at Fastenal, where they can be ordered individually (if not in stock and usually not). Problem is washers and nuts are not sold in singles. Just pointing out the alternative. I am fortunate in having a really good old style hardware store for the goofy or single stuff. I use Fastenal for my quantity purchases though.
  3. markk53

    markk53 jack of all trades...

    Joined:
    Dec 20, 2007
    Oddometer:
    10,338
    Location:
    Delaware Ohio

    Make sure you use anti-seize on them for sure when steel on stainless or stainless on stainless. I am not sure about aluminum. Seems when the bolts/nuts are threaded together the scraping of the surfaces causes some removal of a material that surfaces to avoid corrosion, then the material will bond together - aka sieze up. My brother used stainless for a nut/bolt pinch clamp on a Betor fork axle clamp. They seized and he had to snap the bolts to get them off.

    I'd certainly check on the aluminum/stainless reaction to be sure. Here's Fastenal's take on it.

    Here's another expert's take from an expert in the industry based on what I've found on a net search, Joe Greenslade.
  4. Mr. Fisherman

    Mr. Fisherman PROUD 2B Riff Raff!

    Joined:
    Oct 8, 2006
    Oddometer:
    11,063
    Location:
    Drinking from the Stanley Cup!
  5. AZ TOM

    AZ TOM Long timer

    Joined:
    Oct 21, 2008
    Oddometer:
    4,501
    Location:
    Prescott AZ
  6. HardWorkingDog

    HardWorkingDog Harvey Mushman

    Joined:
    Aug 20, 2009
    Oddometer:
    1,974
    Location:
    Walnut Crick, Cal.
    Damn, good eye there Mr. Tom. I can see a guard on the right as well. :scratch
  7. EEKAMOUSE

    EEKAMOUSE Been here awhile

    Joined:
    Oct 6, 2012
    Oddometer:
    396
    Location:
    PA
    And what's the giant skidplate plz share!
  8. Mikef5000

    Mikef5000 Long timer

    Joined:
    Apr 17, 2008
    Oddometer:
    2,031
    Location:
    Columbus, OH
    Giant skid plate has a 'tool box' on each side.

    The dual radiators is interesting!
  9. Gany

    Gany Been here awhile

    Joined:
    Apr 30, 2007
    Oddometer:
    443
    Location:
    Melbourne, Au
  10. AZ TOM

    AZ TOM Long timer

    Joined:
    Oct 21, 2008
    Oddometer:
    4,501
    Location:
    Prescott AZ
    Dual radiators, a great idea, dummy radiator guard???:huh:huh Seems like another place for catching dirt & mud?
  11. reddirtjoe

    reddirtjoe motorcycle addict

    Joined:
    Dec 21, 2007
    Oddometer:
    2,599
    Location:
    Let's Ride some red dirt!!.... NorthCentOklahoma
    Fork seals? How to replace?




    91 Octane? Wnere? what does everyone else do?:eek1
  12. MeefZah

    MeefZah Curmudgeonly

    Joined:
    Nov 19, 2003
    Oddometer:
    11,336
    Location:
    NE Ohio
    I run 87 mostly, every so often I splurge and put in 93. It runs exactly the same.
  13. Joe Watson

    Joe Watson Long timer

    Joined:
    Jul 20, 2008
    Oddometer:
    1,034
    Location:
    Sunshine Coast, Qld, Aus.
  14. pfy50

    pfy50 Professional nOOb

    Joined:
    Aug 25, 2006
    Oddometer:
    591
    Location:
    Oneida, Tenn.
    Yes but then you would have to cut and match the complex curve angles of the tank area around the fuel pump intake. So much easier to reorder the tank heat shield that comes on the OEM tank and place that around the fuel pump. That is what I did; it fits quite nicely and it took about 5 minutes with the tank off prior to its first installation.:D
  15. Cycle Sector

    Cycle Sector Aka Disco

    Joined:
    Aug 17, 2010
    Oddometer:
    78
    Location:
    San Diego
    Im selling my stock levers in case anyone is interested, perfect condition except for some scuffs on the tip of the brake. Im also including the stock perch. $30 plus $7 shipping takes em. Please message me.

    [​IMG]
  16. Nice_Rumble

    Nice_Rumble Long timer

    Joined:
    Dec 9, 2004
    Oddometer:
    2,326
    Location:
    New London, NH
    Anyone else's license plate light really loose? I tried tightening the bolts but there is an internal spacer that prohibits making it any tighter plus the nuts are capped. Is it loose by design? Shorter bolts or a standard nut makes no difference due to the spacer.

    [​IMG]
  17. MeefZah

    MeefZah Curmudgeonly

    Joined:
    Nov 19, 2003
    Oddometer:
    11,336
    Location:
    NE Ohio
    Yes.

    I took an old handlebar grip, cut a rectangular piece the size of the LP light housing, punched holes in it where the bolts would pass through, and used it as a spacer between the light housing and the back of the fender. It solidified the housing quite a bit and I like to think the rubber adds dampening to keep the vibes from breaking the bulb filament.
  18. 10Cup

    10Cup Long timer

    Joined:
    Oct 23, 2008
    Oddometer:
    2,700
    Location:
    NW Arkansas
    Yeah that's how it's designed, you can add washers behind the cap nuts to help squeeze the rubber and tighten it some.

    I also found my tail light lens loose and no way to tighten it. Ended up putting some thin (IE cut with scissors) foam between it and the plastic. Has worked well now for many many miles.
  19. jon_l

    jon_l Long timer

    Joined:
    Feb 8, 2008
    Oddometer:
    4,265
    Location:
    Collingwood, Ontario
    I noticed the same thing, but didn't do anything about it ,since tightening does not resolve.

    Do we think this is an issue that needs to be addressed, or an intentional design "feature"?
  20. HardWorkingDog

    HardWorkingDog Harvey Mushman

    Joined:
    Aug 20, 2009
    Oddometer:
    1,974
    Location:
    Walnut Crick, Cal.
    :y0!


    NO! :lol3:lol3:lol3

    I still can't get over trying to retrofit a manual cam chain tensioner in this bike.