Yz250x

Discussion in '2 smokers' started by Bump Stop, Jun 4, 2015.

  1. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    New woods 2 stroke from Yamaha! Basically a Mxer with wide ratio, kick stand, and timing/porting changes.
    #1
  2. Rot Box

    Rot Box Been here awhile

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  3. offroadtoys

    offroadtoys Been here awhile Supporter

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    Looks great, but where's the light (or at least the lighting coil)?
    #3
  4. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    I was thinking the same. Then I could install one on my 05!
    #4
  5. jimroid

    jimroid Long timer

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    I thought the same thing about the lighting. Nice having the wide ratio,but I thought a 6 speed might be nicer. Glad to see this bike though.:clap
    #5
  6. Yard Sale

    Yard Sale let's be bad guys

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    Nice try but I'll be holding on to my 2006 YZ250 with large tank, 18" wheel, and milled head.

    They should have at least done a 3 gallon tank for hare scramblers and trail riders.

    But good on them for addressing the one thing the aftermarket hasn't, and which is too much hassle for the rest of us, a WR tranny.
    #6
  7. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    A six speed would be a case change I would think? I don't think the wr trans should be a problem with the adjusted torque curve. I did a 5th gear swap in mine to have a taller road gear, I rarely see 5th on the stuff I ride. Maybe we'll see a factory 300 kit?!:evil
    #7
  8. adam728

    adam728 Long timer

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    Yamaha already has the Athena 300 cc kit in their accessories catalog online.

    I'm glad Yamaha is finally putting out a bike like this. Sure are a LOT of haters already though for it not being setup exactly how they want. Its a step in the right direction guys!
    #8
  9. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    not having a larger tank from the factory is a sin.:deal
    #9
  10. slideways

    slideways EspaƱa

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    Plus 1

    I still believe that the 06 on YZ's are the best suspended bikes out there. I loved my 09 250 XCW but could never get the suspension tuned to the level of the SSS suspension on the Yamaha.
    #10
  11. Yard Sale

    Yard Sale let's be bad guys

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    Because it's a two-stroke with an exhaust power valve. No. The compression ratio is irrelevant. It's the same engine Yamaha has been using since 1999, with some tuning tweaks.
    #11
  12. avc8130

    avc8130 Long timer

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    "All-New" :rofl
    #12
  13. adam728

    adam728 Long timer

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    Piston can't compress anything until the exhaust port is closed. So when the power valve is down theoretical compression is higher than at high speeds when the valve is open.

    Same way 4 stroke guys often look at dynamic compression, that is, after the intake valve closes. One parameter in the list of variables of why a short duration cam might cause detonation on a 10:1 engine where a longer duration cam might run that same engine fine even with 12.5:1 compression.
    #13
  14. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    If it ain't broke.:deal
    #14
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  15. EEKAMOUSE

    EEKAMOUSE Been here awhile

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    Should be same frame right all existing yz parts will fit im assuming at least i hope will make outfutting very cheap
    #15
  16. FreeRiders

    FreeRiders n00b

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    I've got this on my radar...can you pwr a led headlight with the stock stator?
    #16
  17. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    Just run a small battery and recharge it. Not sure but I think it produces AC so you'd need to convert it to DC and get it lowered enough to not fry the LEDs.
    #17
  18. FreeRiders

    FreeRiders n00b

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    Thanks Bump Stop.
    I did buy this bike and I'm in the process of doing just that...using battery pak and led light setup. That's way cheaper than a new stator. I bought a high powered batt pak and charger for $40 off amazon. Stator $179
    #18
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  19. Bump Stop

    Bump Stop 2 Wheeled Drifter

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    Post up the part numbers/suppliers and pictures when you're done so I can copy you!:D
    #19
    FreeRiders likes this.