Yamaha WR250R Mega Thread

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

  1. 12 countersprocket is harder on chains and the countersprocket. Sliders? Won't even go there again.
    Big Brown likes this.
  2. Yinzer Moto

    Yinzer Moto Long timer Supporter

    Joined:
    Jun 13, 2008
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    47,588
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    Pittsburgh PA
    I had a couple 14-50 sets wear out quickly. The last couple at 14-51 got nearly twice the life.
  3. Maybe sprocket choice. I'm getting hella life on 14/50 but would have to go out to the motorcycle shed to look at the OD to see where I'm currently at. Vortex aluminum sprocket yet. If it ever gets uneven and worn out I've thought about changing out to 51 though and getting some wheelbase back ; }
  4. Big Brown

    Big Brown I enjoy a good time, I just haven't found her yet.

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    I definitely don't want to compromise any parts so I'll probably just leave the 12T alone. and upgrade the rear to a 47T or so.
  5. woofer2609

    woofer2609 Less flow, more Gnar

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    Don't do it! I lost 4 hp removing that sticker!
  6. Omegart

    Omegart Been here awhile

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    Garda Lake, Italy
    I found stock sprockets (13/43) even too low in fist and second gear.. I can do pretty much everything off-road and I can keep 60mph on tarmac without being at higher rpm. Is 13-47 that much of a difference?
  7. woofer2609

    woofer2609 Less flow, more Gnar

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    Yes, it allows the engine to have a more usable 6th gear.
    The 14/51 seems to make both 1st and 2nd usable off-road, whereas 13/47 was right in between.
    That being said, going back to 13/43 actually felt pretty good. Better than I remember it.
  8. coresports

    coresports DS4Life

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    Aug 3, 2011
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    USA
    im in the minority (it seems) that prefer the stock gearing...heck, i can start off in second gear around town no problem...off-road i ride dirt roads, 2 track and ORV trails and stay in second/third at speed/higher RPM's a fair amount of time with not a lot of shifting with the Wide Ratio trans...just my experience!

  9. speedtrials

    speedtrials Been here awhile

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    Toronto, ON, Canada
    Comes off very nicely. 10/10. Would remove again!
  10. woofer2609

    woofer2609 Less flow, more Gnar

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    Hi everyone.
    So I insured my new to me 2014 bike which had been sitting in storage since September. During that time, it was started occasionally, on a battery tender, and (I believe) left with non ethanol fuel in the tank. The stator has been changed, I believe.
    I've noticed that when riding in 1st or second gear at a steady throttle, the bike seems to surge or pulse. It's fine at speed, and I'm still able to ride, but annoying nonetheless.
    Any ideas?
  11. derblauereiter

    derblauereiter Mostly made of cheese Supporter

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    It’s warmed up, right?
  12. woofer2609

    woofer2609 Less flow, more Gnar

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    Very much so, yes. I expect a few stumbles for the first 2 minutes or 2 km's.
  13. Cromoth

    Cromoth fan of the magic carpet ride

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    MA
    Ever try a trailer? IMAG0492.jpg
    Mudclod likes this.
  14. Lee Dodge

    Lee Dodge Been here awhile Supporter

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    Aug 9, 2002
    Oddometer:
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    Location:
    Horicon, WI. By da marsh.
    It sounds like you are referring to the low speed on/off throttle jerking that is very common on the WR. It makes it difficult to ride smoothly at lower speeds with low throttle openings.
  15. woofer2609

    woofer2609 Less flow, more Gnar

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    Yes, it just seems more pronounced than I remember it. When the throttle is at a constant setting during cruising in first or second, the bike surges. I may have to go down the CO setting rabbit hole.
  16. advmgm

    advmgm Long timer

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    My '08 does not do that.
  17. Lee Dodge

    Lee Dodge Been here awhile Supporter

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    Aug 9, 2002
    Oddometer:
    767
    Location:
    Horicon, WI. By da marsh.
    I solved the issue on mine with adjustments to the idle speed and the throttle position sensor.
    TaZ9 likes this.
  18. woofer2609

    woofer2609 Less flow, more Gnar

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    I'll explore this as well. Fortunate I didn't have to on the last bike. I may clean out the injector as well. Anybody remember what page the clean out procedure was documented on?
  19. woofer2609

    woofer2609 Less flow, more Gnar

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    My 08 didn't either:dunno
  20. facablade

    facablade Been here awhile

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    Hi which is the way to wear this window air intake. My bike is without flapper without ais with x3 exhaust.
    Previous owner carry it closed with ductape.... View attachment 2168002 IMG_20200306_002324.jpg