Gymkhana

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

  1. Harvey Krumpet

    Harvey Krumpet Been here awhile

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    It's a joy to watch those videos Vulfy. Folk having a blast on their bikes & becoming really good riders as a by product. Love your work.:clap
  2. ohgood

    ohgood Long timer

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    that's the stuff man. i know it was a LOT of editing work to sync the different riders into one course video. cool idea, well done.


    the fz and hornet (that's a hornet right ?) are really getting down.
    annnnnnd it's a FAST course. good pavement ?
  3. Jezza

    Jezza A British Invasion

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    Thats me on the black Kawa Ninja 1000 :D, its a disused airfield, surface is large squares of concrete? I think.

    Grip is surprisingly good, which is just as well as you have to brake quite hard while cranked over in several sections. It says a lot about the great level of riding from everybody that there were no spills, but I came awful close once or twice :eek1
  4. ohgood

    ohgood Long timer

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    crap, my bad, that's even better a performance then on the ninja. have you changed the gearing on the big bike any ?
  5. Vulfy

    Vulfy Been here awhile

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    It is a very rough concrete. Chews up tires really quickly. I'm really curious to see how Jezza's tires hold up as he is really pushing it now, since my old Dunlops only lasted one season on that pavement.

    Thank you for kind words ohgood :D
  6. Jezza

    Jezza A British Invasion

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    My Ninja 1000 is an all standard bike, just a license plate tidy. For Gymkhana I drop the tire pressure F&R by 5 lbs and raise the tick-over to 1300 revs to reduce its tendency to fall into tight slow corners.

    I've had the bike just over 1 year now and for me its perfect road bike, super torquey engine that also has a lot of HP at the top end, the standard raised bars give an upright seating position with plenty of leverage which is great as I get quite aggressive with counter steering. But a simple slide up the road could get very expensive :huh

    My other bike is a KTM 500 EXC street legal enduro bike which I am not getting enough use of, so I have been thinking with a Supermoto kit, it would make a great Moto Gymkhana bike :nod Exactly half the weight of the Ninja 1000, with quick steering and plenty of power.

    I would have to change wheels, fat sticky tires, huge front disc brake, disc caliper, harder F&R springs, but when finished it should look like this :evil
    [​IMG]
  7. Mazaev

    Mazaev Been here awhile

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    That was a really great course, Vulfy, and it's pretty fascinating watching those two runs side by side and seeing how different they are, considering that they timed within milliseconds of each other.

    Some highlights:

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  8. Jezza

    Jezza A British Invasion

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    Great photos Mazaev :thumb

    Who is going to be the first to try the 90 degree slide around the cones :eek1
    <iframe src="//www.youtube.com/embed/44HqXUTl60k" allowfullscreen="" frameborder="0" height="360" width="640"></iframe>
  9. Sckill

    Sckill Been here awhile

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    A perfect example of one of many of Jerry's "sloppy stoppies" through the day. :D
  10. ohgood

    ohgood Long timer

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    wouldn't you just lovvvvve it ?

    [​IMG]
  11. Downs

    Downs KK6RBI

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    I need to find this stuff in California. :D
  12. Harvey Krumpet

    Harvey Krumpet Been here awhile

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    Have I missed something or do you just like sharing motorcycle erotica? The tire & the fat, shiny, expansion chamber framed in green struts brightens my bulb.
    More pics, story please.
  13. Motogymkhanaman

    Motogymkhanaman Been here awhile

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    Hi there jeepinbanditrider and welcome to the wonderful world of Moto Gymkhana.

    Think you are in luck. There is a new setup that has a practice site at Glendale Civic Centre. Give them a shout, I'm sure they would love to have you on-board.

    http://m-gymkhana.com/
  14. Downs

    Downs KK6RBI

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    Wow. 300 miles away. Ouch. I don't know if I'd ever make it up there without taking leave or having a long weekend.


    Sent from my iPhone
  15. ohgood

    ohgood Long timer

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    sorry, I don't have much more....

    one of our local guys shows up to every single Thursday night meet, and smokes folks with his husaburg 570. someone mentioned it might be the ultimate bike, he laughed. a few more questions, then some begging, and he showed up on a kx500, with some siping an old timer told him might solve "irradic, unpredictable, uncontrollable wheespin".

    [​IMG]

    [​IMG]

    he rode interstate to get there, said its "interesting".



    another fella showed up this past Thursday (weekly gp8 / rude butterfly) night and showed off:

    http://www.youtube.com/watch?v=4BSqzJQcsVM

    our first motors cops to demonstrate tossing a honda st just as quickly as a drz can be thrown around. impressive ? yep. ill -never- try one of these guys in the twisties.
  16. Harvey Krumpet

    Harvey Krumpet Been here awhile

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    KX 500 SM ? I'm not worthy & lack the testicular mass. 250's are mad enough for me. Front tires last a life time.

    Those ST's are a very accomplished bike, ridden a few. Once you get rolling the weight seems to vanish making them indecently quick for a behemoth.
    Be interesting doing GP 8's on a bike with linked brakes.
  17. Vulfy

    Vulfy Been here awhile

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    :y0!:y0!:y0!:y0!:y0!:y0!:y0!:y0!:y0!:y0!

    Session this Saturday 08.03 in Brooklyn. Pm me for more details if you are interested in joining. Alternatively, join our Facebook group to be in the loop of all our events, times and locations.

    https://www.facebook.com/groups/motogymkhananyc/
  18. Vulfy

    Vulfy Been here awhile

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    I feel like ranting and complaining a bit, so feel free to ignore this. However any technical advice will be helpful.

    My SV650 front brakes suuuuuuck! God damn those stupid calipers. So the problem started after I got the bike. After riding it for a bit, front lever got mushy to a point of pinching my fingers on the throttle, in order to completely engage.

    Bled the lines with mityvac, definitely no air. Lever did not improve at all.

    Took calipers apart, and found that one piston on each caliper was sticking.
    Cleaned everything out, re-bled the brakes and the lever was nice and stiff. No extra movement, and braking was nice and hard.

    After riding for a bit (a few weeks), lever is back to absolute mush. It does stop better than before though, so I'm not pinching my fingers on the throttle when squeezing it, but lever is not stiff, limp as noodle.

    I do have a suspicion of what could be going on though. As i was rebuilding the calipers, I lubricated pistons with grease designed for brakes. However i have a feeling that that grease is starting to bake on the pistons, making them stick again. I'm going to clean out pistons once again, and change the seals. I won't be lubing them with grease this time though.

    Hopefully this will be enough to fix them. I don't think its MC's fault, as the lever was really nice right after the rebuild, and I didn't do anything to MC. I do have a rebuild kit for it too, so if it stats go to mush again, will try rebuilding MC.

    Can brake degreaser harm rubber seals around pistons? As I was cleaning out calipers, I was spraying them with brake degreaser to get all the gunk off the pistons, to get them moving freely. I did not see any warning on the bottle, to not use on rubber, so it should be ok, but any real life experience/advice?

    I also have a question about bleeder screws. As I crack it open to bleed the fluid, threading lets air in. I use mityvac which holds vacuum in a tube and the bottle, but as soon as I crack the bleeder screw, air rushes in through the threading and I lose negative pressure in the bottle really quickly which makes me close and pump only after a few seconds of bleeding.

    I know that the air is coming through the threading and not from inside the system, as I used same brake grease around threads, and it sealed it air tight. As soon as I done that, no more bubbles and pressure in mityvac doesn't drop as rapidly when I bleed. So system is definitely air free.

    So the question is, would it be ok to use teflon tape on the threads to make them air tight when bleeding? I've read a few posts about that on different forums, and it seems people either do it, or very strongly oppose it. The only argument of opposition is that teflon tape shreds on the threading, and can contaminate and clog the system. I honestly don't think its a problem, as the system does not circulate to move particles through, and won't really contaminate anything. However I'm concerned about teflon's heat resistance. My brakes get hot, really hot! I'm running Motul 600 right now, but I've been boiling regular fluid without any problems, so braked do get over 500F. Would this melt teflon tape? It definitely makes left over grease around bleeder smoke quite vigorously, even after wiping most of it off, after bleeding.
  19. Vulfy

    Vulfy Been here awhile

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    I know there are adapters for SV to mount calipers from CBR and Gixers but I don't want to Frankenstein this bike just yet. If I can get stock calipers working properly, I believe they should provide enough stopping power and feedback for my current applications.
  20. Shooby

    Shooby Anti-Cager

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    Ditto
    Perhaps there's some vacant, on-base lot E. of I-15 ? :D