Yamaha WR250R Mega Thread

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

  1. simmons1

    simmons1 Long timer

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    I agree completely. When I was a kid I always looked for more performance first. In my old fat old age I always go for the suspension first.
  2. Bob in Indy

    Bob in Indy Bob-O

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    Wow... that doesn't seem to be a big difference, at least from the video.
  3. DougZ73

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

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    Rider weight plays a big part is how quick these bikes accelerate. :deal
  4. Scott_PDX

    Scott_PDX Leisure Engineer

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    Yeah, but not much of a scientific test. Sure would like to see a drag race from stop on the mods vs. not modded. I just added a full FMF set up and did the airbox mods etc. Only had a chance to ride around the neighborhood so far, but the "seat of the pants" dyno sure seems like more power than what I'm seeing in that video.
  5. bradrh

    bradrh Been here awhile

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    It's more scientific than a butt dyno :)
  6. leftystrat62

    leftystrat62 Adventurer

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    that's the 4.7 gal
  7. Loud Al

    Loud Al .

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    After it stops raining we can compare my stock WR to your modified WR
  8. scottmac

    scottmac Long timer

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    You should both be running the same gearing to get the best results....
  9. Mikef5000

    Mikef5000 Long timer

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    Agreed. I've pretty much decided that, short of going all out (with a big bore kit), I don't think modding this bike is worth it for more power. For sound, or just for the sake of tinkering, definitely, but not for power.
    In the end, I want more low-mid range power; I could care less about more peak power.
  10. HighFive

    HighFive Never Tap-Out

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    Too many unknowns to make that comparison meaningful........carbon fiber helmet vs fiberglass, chain lube or not, hi-beam or low beam, blue socks or red?

    R² would be gone from the frame. Just sayin

    HF :evil

    Dang, I'm getting interested in my WRR again...
  11. thumpididump

    thumpididump MacGyver

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    Interesting video, yes, and lots of variables. Agreed that the WR in stock form is a very competent machine.

    However, that being said, I have ridden my modded bike and a completely stock WR back to back. The stock bike is fun, but I appreciate being able to snap the front tire up to get over a rock, or a log, etc. Uncorking the airbox along with a free flowing exhaust system is still the way to go.
  12. indypup

    indypup ╭∩╮( º.º )╭∩╮

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    How's my bike compare to yours Mike? I don't have a big bore but I have modded just about everything else. :evil I know you didn't ride it that much but was wondering if you could tell any difference.
  13. Mikef5000

    Mikef5000 Long timer

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    I would love to try yours with stock gearing for a more direct comparison. But that being said, and don't take this personally or anything, but I was disappointed in the lack of difference. Like you said, I didn't ride it much, and like I said, we're running very different gearing, but the fact is, I cracked the throttle several times hoping to loft the front end, but the reality was the same as my bike, I needed to bounce it and/or put some effort into it. You're gearing and tires were much better for off road than mine, but (useable) power wise they are still damn close. Perhaps peak power (like a drag race) you'll walk away from me, but I don't use peak power out on the trails.
  14. indypup

    indypup ╭∩╮( º.º )╭∩╮

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    Yeah, that's what I thought. ;) Speaking of lofting the front end. You were doing that a lot when I was following you. What's your secret for doing that? :ear
  15. Mikef5000

    Mikef5000 Long timer

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    Yeah, lofting is kind of my thing. I've ridden street bikes for a decade, and always wanted to be able to wheelie, but was never willing to risk my bike learning (on pavement). Now that I'm riding dirt I'm giving it my best shot, and getting better every time I go out.

    I don't use the clutch to loft, so that leaves your body and the throttle. On a flat surface... In first gear I can just give the bars a good tug and crack the throttle and it'll float the front tire, good enough to get over a small rock or root or across a small washout. Put my whole body into it (king of lean forward and throw myself back) and crack the throttle and it'll come up plenty far to cross a creek or whatever. In second gear, the 'throw the body weight' thing works to float the tire, but not lift it much. Add a suspension bounce in there and it'll come up more.

    The easier method is with less than smooth ground. A rock or root are all that's needed to bounce the front tire up in first or second gear with a good crack of the throttle.

    What it ALL come down to is timing. Timing when to hit the gas, or tug, or throw your weight, or bounce. It's all about timing, and the only way to get that down is by practicing. Luckily, without using the clutch, the wrr isn't powerful enough to loop you into oblivion without you knowing what hit you. You could certainly loop it if you tried, but you'd have to really be trying.

    All my opinion/thoughts of course.
  16. coresports

    coresports coresports

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    i was actually surprised i stayed as close as i did....i think if we kept going i would get farther behind but then again, i am not a scientist :D

    i have 2 more side-by-side runs from the same day i will get uploaded before turkey day - dam work gets in the way, haha

    dougz73 - we are approx the same weight, fwiw
  17. Scott_PDX

    Scott_PDX Leisure Engineer

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    Deal! But since when did YOU let a little rain slow you down? :D Hoping to get out sometime over the Turkey Day break. Will post up in the usual PNWet areas, or PM me. Know any good "drag" spots?
  18. Rapid Dog

    Rapid Dog bikes, booze, broads...

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  19. PatrickInVA

    PatrickInVA Been here awhile

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    What tail bag is that?
  20. TwilightZone

    TwilightZone Long timer

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