rnickymouse failure Mulholland fest

Discussion in 'The Perfect Line and Other Riding Myths' started by wiseblood, Jul 31, 2012.

  1. Rgconner

    Rgconner Long timer

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    There is a few roads here in nor cal where they don't cut back the "historical" trees that are impeding on the edge of the road.

    A few lean out into the apex of blind curbs, the branches will strip the skin off your face without a full face helmet.
  2. JohnCW

    JohnCW Long timer

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    Yes he's lousy on the throttle, but seemed to me it was the peg dragging that brought him undone. So perhaps an incorrect set sag (front but mostly back), possibly incorrect spring rate causing the bike to squat even lower as he gets on the throttle, and a failure to hang off to at least some degree are the possible reasons.
  3. Mgbgt89

    Mgbgt89 Long timer

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    Look at the guys wrist in slow mo. At least he was wearing good gear.
  4. C/1/509

    C/1/509 Why?

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    What the heck was he doing with the throttle?
  5. eatpasta

    eatpasta Lawnmower Target

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    Ive seen smoother heavy equipment operators than that - holy hell man
  6. crofrog

    crofrog Long timer

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    When you get on the throttle of a chain driven bike, the ground clearance increases not decreases because the chain torque extends the rear swing arm.
  7. wiseblood

    wiseblood Hall Monitor

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    Even *I* can figure out what happened to this 'tard: He lost the front as soon as he rolled off the throttle at full lean. :fpalm
  8. GSAragazzi

    GSAragazzi Long timer

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    Seems to me that he -not only was jerky with th throttle and upsetting the balance and transferring weight front to back to front- but he was not counter steering. Look at his left hand before the fall. If anything he should have pushed so that the bike would slide on it side and away fom him not tuck the tire lik it did.
  9. fast4d

    fast4d Long timer

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    I think he was having a seizure
  10. Motor7

    Motor7 Been here awhile

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    :rofl
  11. UnsureFooting

    UnsureFooting Title of User Here

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    Ummmm.....
  12. Tripped1

    Tripped1 Likely Lost.

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    True statement.


    Issue is that throttle is built into the torque equation for the rear so fucking up with the the thottle is still bad new bears.
  13. UnsureFooting

    UnsureFooting Title of User Here

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    But... The chain pulls on the sprocket ABOVE the axle. Which makes me think the swingarm would rise, reducing clearance.
  14. Wyvern

    Wyvern Long timer

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    isn't it a wheelbase thing ? ...
  15. UnsureFooting

    UnsureFooting Title of User Here

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    [​IMG]

    Well, according to this FF, I'm wrong.
  16. JohnCW

    JohnCW Long timer

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    It may extend or compress depending on a number of variables. And please don't quote me Keith Code as the source of wisdom. There are any number of technical publications that will explain why a bike can either squat or rise under acceleration. Here's just one.

    http://www.peterverdone.com/archive/rideheight.htm

    Basically weight transfer will try and compress the rear suspension, and the swing arm will try and drive under the swing arm pivot point lifting the rear suspension. The rear suspension height (angle) is just one influence. Even changing the sprocket sizes will upset these competing forces. The bottom line is there is no absolute rule. As the article above explains a little squat is desirable. GP bikes have a number of adjustments that are used to control and achieve the desired squat under heavy acceleration.
  17. Tripped1

    Tripped1 Likely Lost.

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    Other way, doesn't matter in relation to the axel, it masters from the pivot, and the longer the swing arm the more anti squat generated
  18. UnsureFooting

    UnsureFooting Title of User Here

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    That, I will disagree with. I read through the chain pull section in the book I posted.

    The relationship that matters is the positions of the top of the rear sprocket, swing arm pivot, and top of the drive sprocket. Even then, it also matters what the center of gravity angle of movement is doing.

    The geometry involved says that if the swingarm was infinitely long, there would be no change in attitude.


    I honestly didn't understand all the math or physics involved, but it was detailed enough to convince me, lol!

    Edit - I agree, not disagree.
  19. dmcd

    dmcd Been here awhile

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    I think that the riders apparent Parkinson's disease had more to do with the crash, than whether the swing arm wanted to extend or compress ;-)
  20. Tripped1

    Tripped1 Likely Lost.

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    Easy enough to test, hold the front brake and gas it, see if the tail doesn't rise.