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Thread: Race chassis

  1. #1456
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    28th November 2013 - 21:58
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    I think there is a bit about the Can-Am/Rotax racer in one of the Mick Walker books.
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  2. #1457
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    28th November 2013 - 21:58
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    This stuff probably ought to be in the Oddball thread...
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  3. #1458
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    28th November 2013 - 21:58
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    Quote Originally Posted by Michael Moore View Post
    I've added some more material from Norman Hossack, mainly some detail photos of his Ducati street bike conversion (the sides of the upright bolt to the center main section and he also has the outer portions of the axle attached to those side members) and a few photos of a big-block Guzzi frame during conversion.

    http://www.eurospares.com/hossack.htm

    cheers,
    Michael
    Some other bits, very poor quality, sorry.
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  4. #1459
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    28th November 2013 - 21:58
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    Even worse quality!
    From Performance Bikes magazine that seems to have gone bust...
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  5. #1460
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    25th March 2004 - 17:22
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    They merged with Practical Sportsbikes mag and have an inner section. They were a bit crap for the last ten years but I was buying it out of habit.
    I've been told. Dreaming`s free.
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  6. #1461
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    28th November 2013 - 21:58
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    German TZ250 with wishbone/steered girder front end.
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  7. #1462
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    28th November 2013 - 21:58
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    Few more of the Hossack TZ
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  8. #1463
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    28th November 2013 - 21:58
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    Displayed at the (hipster) Bike Shed Show. Did he like everything about the Tesi, except that funny front end, or what?
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  9. #1464
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    13th June 2010 - 17:47
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    Quote Originally Posted by guyhockley View Post
    Displayed at the (hipster) Bike Shed Show. Did he like everything about the Tesi, except that funny front end, or what?
    Owner/builder must have incredibly long legs - look at the seat height vs footrest position.
    If it had high bars you could ride it standing up - like a cycle pacer.
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  10. #1465
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    28th November 2013 - 21:58
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    I took a phone picture of someone else's magazine and somewhere along the line it's become distorted, the original looked more normal...

  11. #1466
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    20th January 2010 - 14:41
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    Seen this last night
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    Kinky is using a feather. Perverted is using the whole chicken

  12. #1467
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    20th April 2011 - 08:45
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    Espargarò-KTM front wheel bounce;
    at 00:20 it gets interesting:

    https://www.facebook.com/pol.esparga...1560168195785/

  13. #1468
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    1st May 2016 - 13:54
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    Quote Originally Posted by Frits Overmars View Post
    Espargarò-KTM front wheel bounce;
    at 00:20 it gets interesting:

    https://www.facebook.com/pol.esparga...1560168195785/
    Very interesting. It looks like the rider is watching it happen too!

  14. #1469
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    20th January 2010 - 14:41
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    Quote Originally Posted by Frits Overmars View Post
    Espargarò-KTM front wheel bounce;
    at 00:20 it gets interesting:

    https://www.facebook.com/pol.esparga...1560168195785/
    Quote Originally Posted by Pursang View Post
    Very interesting. It looks like the rider is watching it happen too!
    Really really bad chatter isnt it.
    here is a less dramitic version
    https://twitter.com/motogp/status/10...924224?lang=en

    i cant believe the saves thee guys grind out day in day out, fricken aliens the lot of them.

    i have a theory its like like riding ruts in Mx
    i think some riders dont seem to get front chatter as they dont grip the bars and bike as tight?
    you watch the best rider they are always loose on the bike they go with the bike a fair bit.
    Given a few million dollars a few years a bevy of women and a small Labrador i could dial that out for him. If only he asked.



    Kinky is using a feather. Perverted is using the whole chicken

  15. #1470
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    1st May 2016 - 13:54
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    Quote Originally Posted by husaberg View Post
    i have a theory its like like riding ruts in Mx
    i think some riders dont seem to get front chatter as they dont grip the bars and bike as tight?
    you watch the best rider they are always loose on the bike they go with the bike a fair bit.
    Given a few million dollars a few years a bevy of women and a small Labrador i could dial that out for him. If only he asked.
    Not sure about the rut theory?? Front wheel will tend to track around the rut, so long as you don't get the front wheel too light and climb out of it!
    But I agree you need to let the front end have its way. This looks more like a front knobby walking around on a hard, oiled, dirt track surface. Basically bouncing from knob to knob.

    There is a LOT of different things happening before and around 20s. (The whole system, Bike & Rider, is a Quivering Mass, not derogatory, just an observation)
    I would expect that the mechanics/technicians know enough about suspension to have the springs and damping pretty close.
    Looks to me that the front tyre is oscillating on very edge of grip and side slip, producing weight transfer effects in the tyre itself, that the forks cant really monitor or keep up with.

    Here's Mr. H looking for similar, in the days before HD SloMo Video.


    Cheers, Daryl.

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