Yamaha WR250R Mega Thread

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

  1. Fitty

    Fitty Shopping cart rider

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    This is the only engine failure I know of, so certainly not an epidemic. Part was updated in 2010. Just an FYI.

    http://www.advrider.com/forums/showpost.php?p=17616446&postcount=26279
  2. indypup

    indypup ╭∩╮( º.º )╭∩╮

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    Looks pretty impressive if you crossed over those huge rocks/concrete...
  3. Bogus Jim

    Bogus Jim Been here awhile

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    The starter damper does slip, but only under high torque loads. It's intended to prevent gear/starter damage when something locks up. The starter clutch, on the other hand, should spin very freely in one direction and lock in the other. If it's locking in both directions that could definitely cause a racket.

    I just had my engine apart recently... also @ 22,000 miles, same as yours. The fact that your oil is clean would seem to indicate there is no major damage yet. Good luck, let us know what you find.

    [​IMG]
  4. indypup

    indypup ╭∩╮( º.º )╭∩╮

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    Wow, that looks like a puzzle I would like to put together! Nice first post!
  5. WeazyBuddha

    WeazyBuddha Carbon-Based Humanoid

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    I was thinking the opposite :lol3
  6. skierd

    skierd Wannabe Far-Rider

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    I was more thinking "Wow someone must be single!" :lol3
  7. OLEARY

    OLEARY Enlightened Voyager

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    I was thinkin 'It must have been a long winter up in them thar hills!' :norton
  8. Red Sand

    Red Sand Been here awhile

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    I was thinking how inspirational it is that someone did that.

    It motivates me to do the simpler things with hopes I can move up to that level someday.
  9. manfromthestix

    manfromthestix Lost in Space

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    Ha! That was my first thought as well! My wife is supportive of my habit, but I'm pretty sure she wouldn't enjoy having my engine in bits all over the dining room table.

    Welcome to ADVrider, Bogus Jim! I lived for many decades in Wyoming and rode in the Black Hills quite a lot. It's an outstanding area. I hope you had a decent winter and aren't looking at another year of forest fires, there can't be much left to burn!

    It motivates me to do the simpler things with hopes I can move up to that level someday.

    Simple things, yes. I hope I never have to see the innards of my engine like that. My WR250R is my 45th motorcycle and I've ridden who knows how many miles and never had to do that to an engine. Lots of tires, tune-ups, tweaks, fixes, service, seals, minor repairs but never major surgery. When I was racing MX on two-strokes, I had to rebuild the top end repeatedly (cylinder, piston, rings) but never had to dig into the lower intestines like that. Hopefully he did it out of curiosity and not because something went badly wrong and it exploded.<!-- / message --><!-- sig -->

    Doug
  10. AdvRich

    AdvRich Parallel Reality

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    :ricky :kumbaya :beer
  11. AdvRich

    AdvRich Parallel Reality

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    :dg and for dessert the sound of a purring WR sipping on a full tank of premium.
  12. bash3r

    bash3r I ain't no DingWeed

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    Wow... has the cost of D606s gone up everywhere or what... $93 for a rear & $90 for a front.. a couple of yrs ago we were paying $65 bucks for each.

    I need a new rear.. this set of D606s has lasted me a long time so I don't know why it bothers me so much to pay almost a big bill per tire but it does.. :evil

    Anyone find a deal on 606s or recommend a different set? I've heard mixed reviews on the K270s and Pirelli XCMHs.. maybe I just gotta fork up the cash.. just not sure there's a comparable tire out there for riding here in MO..

    Need this rain to stop already! :cry
  13. BlueLghtning

    BlueLghtning Riding is my passion

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    I was wondering if anyone had run the Motoz Tractionator Tires. - http://www.phatperformanceparts.com/Avon_Race_Tires_s/585480.htm

    They have the Desert H/T DOT tires and the Enduro I/T DOT tires. The Enduro seem to be a good setup for all around terrain. If you are in the desert or frequently ride on dry terrain, the Desert looks mean! They come in a little cheaper than the D606's.

    The Husky guys love these tires. I've seen a few mentions when I searched for WR250R, but no true reports. A lot of reports I'm digging up too are on the non DOT tires which I think is all they sold a couple years ago. The DOT series seems to be a bit on the newer side?

    Motoz Tractionator Desert H/T DOT Tires - http://www.phatperformanceparts.com/Motoz_Tractionator_Desert_H_T_DOT_Tires_p/motoz-tracht-dot.htm
    [​IMG]

    Motoz Tractionator Enduro I/T DOT Tires - http://www.phatperformanceparts.com/Motoz_Tractionator_Enduro_I_T_DOT_Tires_p/motoz-enduroit-dot.htm
    [​IMG]
  14. cjbiker

    cjbiker Nobody's Robot

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    I love the XCMH front. I see no reason to try anything else. I don't have enough experience with the XCMH rear yet, so I can't pass judgement. I will say that 18 psi is too much for the rear. Works much better at 13-15 psi.

    My WR came with a Kenda K270 on the rear, and I don't like it. There's no reason to run those if you're looking for a 50-50 tire when the Shinko 244 is better and cheaper.
  15. Bogus Jim

    Bogus Jim Been here awhile

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    Nope, the engine is OK. The stator burnt out (badly), and after replacing that, I started seeing some junk in the oil filter. Sometimes that stuff will plug the oil intake screen and then your engine is usually toast. So, to be on the safe side I split the cases and cleaned everything. In hindsight it probably wasn't necessary because the screen didn't have much blockage, but at least I got to see the innards. :D

    This was also the first valve clearance check on this engine, @ 22k miles. The intakes were both OK at 0.15 mm, the exhausts were a bit tight at 0.20 mm.
  16. DougZ73

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

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    I run XCMH on the front and rear. I like them a lot. If I am going to do any amount of street, I'll air them to 15-16, but once offroad, 12-13...strictly sand, they go down to 10-11. Rim locks front and rear.

    The issue is they are a 90/10 tire, whereas the D606 is a good 50/50 tire. D606 will a lot slower than the Pirelli's on pavement.
  17. EEKAMOUSE

    EEKAMOUSE Been here awhile

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    D606 50/50 tire really?

    Sent from my PG86100 using Tapatalk 2
  18. DaymienRules

    DaymienRules Traffic target

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    -BogusJim
    A rough estimate, how much time did it take to split the cases down that far?
  19. DougZ73

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

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    really, well probably a 70/30, as it has aggressive knobs, but handles and wears really well, more like a 50/50 tire on pavement. I have run Track masters(great on sand) and the XCMH's, and they are great offroad, but do not wear very well when I have too many pavement miles on them.
  20. Bogus Jim

    Bogus Jim Been here awhile

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    It took me a couple hours to pull the engine, and probably 9-10 hours to split the cases and clean things. I left the throttle body on the bike, that probably saves about 15-20 minutes because there's less stuff to unhook.

    The service manual has pretty good instructions for engine disassembly. (except for the part about resetting the cam chain tensioner... something was definitely lost in translation there)