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Thread: Available power #'s that can be had from a XR650L Conversion

  1. #1
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    Available power #'s that can be had from a XR650L Conversion

    This is the power available out of a 717cc build on all motor, just thought some would like to know that are thinking of doing a XR650L motor swap, this is a dune-rideable motor, I've got it apart now to go bigger.

    The XR650L can be built up to 794cc's
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    XR650 quads

  2. #2
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    Apr 2005
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    Impressive numbers.
    Why the XR650L motor as opposed to the XR650R motor?

    I always thought the XR650R motor in the 450R chassis would make a great Baja/Desert quad.
    Brandon -O||||O-
    1998 Honda TRX300EX (330)

  3. #3
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    I use the XR650L motor because the XR650R did'nt exist when I started building these motors and conversions 10 years ago, factory electric start as well.
    I just stuck with this powerplant because of all the R and D that I have done from scratch to get the #'s I'm getting and all the custom pistons/cams/rods, and such that I have designed for this motor.
    XR650 quads

  4. #4
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    You should share this in the XR600/650 subforum over on thumpertalk.

    That's amazing power. I'm surprised it stays cool enough to stay together!
    "It ain't what you don't know that gets you into trouble.
    It's what you know for sure that just ain't so. "

    --Mark Twain

  5. #5
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    By running methonal, the motor stays cooler than most liquid cooled engines on gas, oil temp is mostly below 200 degrees, that is plenty cool to keep performance up and longevity going.
    XR650 quads

  6. #6
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    Nov 2005
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    Originally posted by XR650
    By running methonal, the motor stays cooler than most liquid cooled engines on gas, oil temp is mostly below 200 degrees, that is plenty cool to keep performance up and longevity going.
    Ah yes....methanol does have a very high latent heat of vaporization. Sucks up lots of heat as it vaporizes!
    "It ain't what you don't know that gets you into trouble.
    It's what you know for sure that just ain't so. "

    --Mark Twain

  7. #7
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    Looks pretty impressive, i'd love to see some pictures of these quads if you have some?

  8. #8
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    Originally posted by XR650
    By running methonal, the motor stays cooler than most liquid cooled engines on gas, oil temp is mostly below 200 degrees, that is plenty cool to keep performance up and longevity going.
    Do you have any information running gasoline?

    Drag racing, yeah, I'll run methanol. But for cruising the dunes and carving bowls, I want to be running gasoline.
    Duncan Racing 340PV, +2 A-arms, +4 LSR axle, and a host of other goodies.

  9. #9
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    Originally posted by TheNewn
    Looks pretty impressive, i'd love to see some pictures of these quads if you have some?
    Here are a few pics
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    XR650 quads

  10. #10
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    Sep 2005
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    another
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    XR650 quads

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