Gymkhana

Discussion in 'The Perfect Line and Other Riding Myths' started by Vulfy, May 6, 2012.

  1. YamahaRN

    YamahaRN Adventurer

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    Any video with a bigger bike? like a Hayabusa or Goldwing going at the same pace
  2. Harvey Krumpet

    Harvey Krumpet Long timer

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    This dude cracks me up, a few videos of him on ewetoob.

    <iframe src="//www.youtube.com/embed/7GMOJkS4xAU" allowfullscreen="" frameborder="0" height="315" width="560"></iframe>
  3. Motogymkhanaman

    Motogymkhanaman Been here awhile

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    Found this video of a Japanese rider getting UNDER 26 seconds on the GP8!

    <iframe width="560" height="315" src="//www.youtube.com/embed/v1PU-VZcnQQ" frameborder="0" allowfullscreen></iframe>
  4. ohgood

    ohgood Just givver tha berries !!!

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    that's incredible! we've spent entire afternoons trying to get under 30 before !!!! 25 really feels impossible. but apparently it is not.

    if anyone knows that rider, also him on the back! :thumbup::thumbup:
  5. Harvey Krumpet

    Harvey Krumpet Long timer

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    That is fantastic!

    I'm always amazed at how we end up puffing & panting, hearts racing, when we practice. Glad to see it's universal. That guy is buzzing.
  6. Idle

    Idle Been here awhile

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    That was quick! He also made pretty good time dismoumting and showing his time.

    I was out at an ohv park yesterday and we set up GP8 in the dirt.

    Son with little riding experience enjoyed it and wants to do it again..

    His best of three was 55, mine was 45. I'm not sure what approach to take, as I can't quite get my drift on to swing the rear around, and my speed was too fast to make a tight turn.

    He was making much sharper turns than me, much better form.

    [​IMG]

    [​IMG]

    I've marked out a few practice spots so I can practice on my way home. I superglued shiny pennies to the tarmac, so only have to drop some halfballs on top of them.



    Finding an ideal spot that is good for a group is harder than I thought.
  7. Harvey Krumpet

    Harvey Krumpet Long timer

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    Super glued some pennies down?:roflBrilliant!
  8. ohgood

    ohgood Just givver tha berries !!!

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    this ! thanks for sharing, I'll be using your setup in the future :):):thumbup:
  9. Jezza

    Jezza A British Invasion

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    Great video of that guy running a sub 26 sec :eek1

    Also was interested in his self timing setup, with professional timing equipment being so expensive, I have a few questions for you tech heads. He seems to be running a light beam? switching the lap button on a modified conventional stopwatch. Does anyone know how he did this?

    Alternatively, I was also thinking how difficult would it be to build a portable retro-reflective visible laser (TX & RX in a single unit) bouncing the light off a reflector, when the bike cuts the beam it would start the clock, second time it cuts the beam stops the clock. O/P of the laser to a simple timing program on a laptop. Then displaying the laptop screen to a TV via HDMI output, so everyone can see the recorded time. I would use a small portable generator for my power supply.

    His stopwatch from the video
    [​IMG]
  10. Vulfy

    Vulfy Been here awhile

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    http://www.instructables.com/id/Laser-Sensor-Timer/


    Been meaning to build this for our group, but I never touched a soldering iron before in my life... But there is a first time for everything.

    Didn't you get that lap timer? Pretty much same idea, with convenience of the timer being mounted on your bike, so you don't have to get off to see how well you did.
  11. Oreh

    Oreh Adventurer

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  12. Jezza

    Jezza A British Invasion

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    I guess you will need a second transmitter box, so if you start with one transmitter on your right at the start, a second one to be placed on your right at the finish cones.
  13. Motogymkhanaman

    Motogymkhanaman Been here awhile

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    A couple of our riders use those lap timer devices that have a trackside beacon and they use two beacons so that the receiver gets a hit no matter which way the bike is pointing.

    The only trouble is that they are a bit coarse and so may not be all that accurate. I did write to our friends in Japan to see if any of them knew a way of modifying a stopwatch to accept a start/stop signal from an i/r gate. It seems that they use the sensors from garage door systems and then do some magic with the electronics in the watch itself. So far nobody has been able to point me in the direction of a wiring diagram that shows how this is done.
  14. Vulfy

    Vulfy Been here awhile

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    The timer itself is pretty accurate, and holds a lot of laps to scroll through. However the triggering system is a bit cumbersome to set-up and sometimes doesn't pick up the signal, or can pick up some other infrared light source and start/stop your timer in the middle of the lap. I found it works for me about 90% of the time, and when it doesn't, it usually just needs a readjusting on the bike, or old batteries in the beacons.


    As far as using this timer for GP8, yes, you need two beacons, set up on both sides of the start/finish line.

    Those beacons are nothing more but an infrared light bulb. You can probably just get it at Radio Shack and strap it to a battery.
  15. Motogymkhanaman

    Motogymkhanaman Been here awhile

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    With regard to quick & easy timing systems, I have found something that I think will do the trick.

    I have written to the organisers of the event that this kit was built for to try and track down the designer. If I can persuade him to reveal his parts list and a wiring diagram then I will post it up ASAP.

    <iframe width="420" height="315" src="//www.youtube.com/embed/b-NDJuqeOBs?rel=0" frameborder="0" allowfullscreen></iframe>
  16. Vulfy

    Vulfy Been here awhile

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    This might have gotten lost, as it was the last post on the previous page, and might have gotten skipped over as the page turned, but this link has instructions and wiring diagrams for exactly what you guys are looking for.

    As I said, the only reason I haven't built this, is that I never had any experience with assembling electronics.

    I tried to outsource this to a few people I knew, but it never got off the ground.

    Here is the link:

    http://www.instructables.com/id/Laser-Sensor-Timer/
  17. RichBeBe

    RichBeBe All Hail Seitan!!!

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    Not that this will help much since they are cheap, but I have a bunch of cheapo stopwatches if anyone wants to try this I can send or meet up to give one or two to someone.
  18. Motogymkhanaman

    Motogymkhanaman Been here awhile

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    A variation on the Moto Gymkhana theme is Duel-Attack, a bit like drag racing only with a high degree of bike control involved. This video is of our group in Vietnam just having fun by running it as a team event.

    <iframe width="560" height="315" src="//www.youtube.com/embed/I-acYUXVIbw?rel=0" frameborder="0" allowfullscreen></iframe>
  19. Vulfy

    Vulfy Been here awhile

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    I really like this idea. As much as time attacks are, a head to head competition is a good change of pace. We are definitely doing something similar this summer.
  20. pterus

    pterus n00b

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