American Motorcycle Gymkhana Riders Association

Tools and Techniques => Practice, Practice, Practice => Topic started by: buzz on June 18, 2012, 09:32:59 AM

Title: Post your GP8 times
Post by: buzz on June 18, 2012, 09:32:59 AM
Started this year at 43.xx

Last run was a 36.1.

My goal is to get down to 29.99


Don't be shy post up.
Title: Re: Post your GP8 times
Post by: Motogymkhanaman on June 18, 2012, 10:31:56 AM
Well done on the GP8 time. Cutting it from a 43 to a 36 is no mean feat as we find that on average most new riders take around a minute to complete a GP8, so you are already well ahead of the game.
 
Title: Re: Post your GP8 times
Post by: BillZ on June 18, 2012, 03:10:44 PM
Really need to get timing device so I can report here...
Title: Re: Post your GP8 times
Post by: ironslede68 on June 20, 2012, 12:35:04 AM
when will the next GP8 be in birmingham?

the first one we did, i had a 43 but i didn't make the last event.
Title: Re: Post your GP8 times
Post by: KrisCook on June 20, 2012, 09:22:36 AM
53.  I haven't broken 53 yet! But I'm consistent.  Every run is somewhere in the 53 to 54 second range. 
Title: Re: Post your GP8 times
Post by: ironslede68 on June 21, 2012, 12:13:41 AM
53.  I haven't broken 53 yet! But I'm consistent.  Every run is somewhere in the 53 to 54 second range.
 


and might i add, smooth as silk
Title: Re: Post your GP8 times
Post by: KrisCook on June 23, 2012, 12:12:51 PM
53.  I haven't broken 53 yet! But I'm consistent.  Every run is somewhere in the 53 to 54 second range.
 


and might i add, smooth as silk

I think I love you.

But seriously, I obviously need to figure out some technique. 
Title: Re: Post your GP8 times
Post by: Vulfy on June 24, 2012, 07:27:25 PM
37

( yeah I'm bragging )   ;D   8)
Title: Re: Post your GP8 times
Post by: GymkhanaDog on October 06, 2012, 05:35:11 PM
I have no times on my Nighthawk which I have pretty much all my Gymkhana experience on and am very comfortable and fast(IMO) on, but my best 8's time today that I timed was 82 seconds. Using my new SV650, mostly unfamiliar with  the response of everything at these low speeds. Wasn't really aiming for a fast time, but more to try and figure out how everything felt.

But, I'm not embarrassed to say that my first run out with my new bike was 82 seconds. Time to work on cutting that in half. :)
Title: Re: Post your GP8 times
Post by: buzz on October 29, 2012, 09:54:56 AM
Practice is the way! Keep at it.

Got down to 35.0

I got 5 seconds till my goal. That is one second per lap.
Title: Re: Post your GP8 times
Post by: yamahamer on October 29, 2012, 04:45:01 PM
 :) 30.9 on the Ninja "Turd" 500
Title: Re: Post your GP8 times
Post by: Motogymkhanaman on October 31, 2012, 05:34:43 AM
Better do some more practice as our friends in Thailand are getting some decent times in. :)

http://youtu.be/CPJemLb-aF8 (http://youtu.be/CPJemLb-aF8)
Title: Re: Post your GP8 times
Post by: BillZ on November 01, 2012, 08:12:46 AM
I'm stuck in the high 50's.  I know that it's not supposed to be about the bike, and I know that I need to practice more, but I have to wonder about the throttle response on a Vstrom 650 with fuel injection.  It's so very touchy and the torque of the Vtwin has a big hit when the fuel injection kicks in.  I hope to adjust the throttle position sensors this winter to smooth that response out as much as possible but I have been lusting after a inline four cylinder like a ninja or something else that may be more suited.  Problem for me is that I can only afford to have one bike and I have my Vstrom sorted out to fit me physically.
Title: Re: Post your GP8 times
Post by: Motogymkhanaman on November 01, 2012, 11:43:01 AM
Big, punchy V Twins like the Strom can be a bit of a nightmare to control at low speeds especially if they are fuel injected as the delivery is either ON or OFF with nothing inbetween. The trick is to find out how slow the bike will go with the throttle slightly open against the brakes. Do this exercise in a straight lline so that you don't have to think too much about other stuff. Use varying amounts of throttle and brake until you reach a speed where the bike is pulling but not snatching at the transmission. If you release the brake at this speed the bike should surge forward without need for any additional throttle.

If however, you find that the speed at which the transmission is snatching is too high then you will have to start using the clutch to tame the power delivery. This gives you three things to think about, but it is a lot cheaper than buying another bike:)

 
Title: Re: Post your GP8 times
Post by: BillZ on November 03, 2012, 01:21:24 PM
Motogymkhanaman:  I don't know many riders who wouldn't like to have another bike.  I sure would, but I just can't manage that extravagance.  I have been practicing exactly what you describe with limited results, and I will continue to use that technique.  However, this engine from Suzuki has been known for this characteristic for years.  There are multiple threads about adjusting the Throttle Position Sensor to smooth out the throttle surge at low speed.  I'm planning on doing this adjustment this winter when I find myself "snow bound" or prevented from riding for an extended period.  Until then, RIDE ON!  Thanks again for the advice and encouragement.
Title: Re: Post your GP8 times
Post by: Springer on November 04, 2012, 01:41:49 PM
 Using an aftermarket fueler can help with the ruff spots on a fuel injected bike. In the U.S. motorcycles come very lean from the factory do to EPA regulations. Even without an aftermarket exhaust a decent aftermarket fuel management unit will help smooth out throttle response and add a little power.
 Units can range in price from $100.00 dollars (U.S.) to over $1000.00. The XIOD units are cheap but they are just a resistor that is placed inline or completely does away with the O2 sensors. This richens the air/fuel ratio across the entire RPM range. The problem is that in some parts of the RPM range it will cause a mixture that is too rich. A mixture that is too rich will rob power and cause fouling of the spark plugs.
 Aftermarket fuelers in the $200.00 - $400.00 range will usually give the operator a simple way to richen the mixture in the lower and medium RPM range. This is where most motorcycles are lean at. The Patriot Top Fueler is one example of this type of fueler.
 Fuelers in the $500.00 - $1000.00 dollar range offers more options to tune the motorcycle over the entire RPM range using a Dyno, a trained technician, and a computer. Other options are available like a self-tuning feature with wide band O2 sensors.

 Also some factory brands can be tuned by a technician at a dealer using a Dyno, a "off-road or only program" and a computer.     
Title: Re: Post your GP8 times
Post by: momopapa on December 09, 2012, 03:56:44 PM
Hello,

This is my first post from Boise Idaho.
I'm a return rider in US.
I've got a motorcycle endoesement in November and then I bought a CBR600F3 in the same weekend.

It was about 41 seconds.
I don't have a timer so this time is counted from the video.

<iframe width="560" height="315" src="http://www.youtube.com/embed/z4-LlbzYvMI" frameborder="0" allowfullscreen></iframe>

Title: Re: Post your GP8 times
Post by: Lnewqban on December 09, 2012, 10:31:22 PM
Welcome to the site !!

Great time and rhythm.   :)
Title: Re: Post your GP8 times
Post by: Motogymkhanaman on December 10, 2012, 04:55:49 AM
Well done momopapa that is quite excellent riding. To get a 41" GP8 after such a short period is nothing short of amazing. Try and remember the mantra "Your bike goes where your nose is pointing" so I suggest that you study the hundreds of Moto Gymkhana videos on Youtube to see how the top riders 'snap' their heads around so that the next pylon is always in their direct line of vision. By doing this, you will see your times get quicker and quicker.

Keep posting videos of your attempts, so we can all see how you are improving.
 
Title: Re: Post your GP8 times
Post by: momopapa on December 11, 2012, 03:32:34 PM
Thanks Lnewqban and Motogymkhanaman for welcoming.

Since I'm still a beginner, I used methods to make it easier for me:
1, Idle speed up to about 2000 rpm to prevent stop engine.
2, Used only rear brake.
3, Drag rear brake to make it slow down, lean and steer.
4, Was also dragging rear brake when accelerate for stabilizing it OR the bike stood up suddenly.
So my next target might be using Front break to make the front suspension compressed and keeping it while banking the bike to the full bank.
Full lock steering is also my goal too.

Title: Re: Post your GP8 times
Post by: buzz on December 18, 2012, 05:36:45 PM
On a bike with clip ons. I'm impressed
Title: Re: Post your GP8 times
Post by: momopapa on December 26, 2012, 07:02:45 PM
Happy Holidays everyone.

I was able to have time to practice while my wife was making Christmas dinner, ... bad husband :-)

It was not a complete cycle of GP8 but I can estimate time by time of one cycle X 5 = about 40 seconds.

バイク練習 Day6 (http://www.youtube.com/watch?v=DDdUlvp8ndA#ws)

I will keep posting even tiny steps.

Title: Re: Post your GP8 times
Post by: Motogymkhanaman on December 27, 2012, 05:38:22 AM
Well momopapa, you must be a brave man indeed to sneak out for some GP8 practice whilst the good lady is slaving over a hot stove! Nice riding by the way.
Title: Re: Post your GP8 times
Post by: momopapa on March 03, 2013, 05:20:38 PM
Spring has come  :-)
Pile of snow's gone so began to ride.


http://youtu.be/iuiFhlJTiPo (http://youtu.be/iuiFhlJTiPo)

A little improved.
Title: Re: Post your GP8 times
Post by: Motogymkhanaman on March 05, 2013, 05:04:21 AM
One of the Polish Moto Gymkhana riders is cracking in some great GP8 times.

FILE0010 (http://www.youtube.com/watch?v=OQ0vvDHFwAk#ws)


Check out his party trick.

Suzuki GS500 slow cornering :) (http://www.youtube.com/watch?v=K2bTLKundwA#)

Title: Re: Post your GP8 times
Post by: ViciousCycle on January 15, 2014, 05:23:39 PM
My best time last weekend: 39.68. Gonna try to beat it this weekend.
Title: Re: Post your GP8 times
Post by: xp@ on February 19, 2014, 07:47:39 PM
I managed to clock 39.2 on my CB900 but then got my 650 Transalp out and shaved off 4.1s so now on 35.1.

I can get cleaner, I can get tighter and I'm thinking a return to the conti-attack would be welcomed (the bridgestone is not feeling nice).
Title: Re: Post your GP8 times
Post by: Springer on March 30, 2014, 05:45:24 PM
 Good times y'all! Keep it coming!
Title: Re: Post your GP8 times
Post by: iwasz on March 16, 2016, 06:10:48 PM
Hello fellow gymkhaners.

https://youtu.be/TOBAtMC-CO0

  I am trying to get motivation to polish my moto-gymkhana stopwatch project (https://hackaday.io/project/7606-moto-gymkhana-stopwatch). Right now it is quite usable for me (see video https://youtu.be/TOBAtMC-CO0), but I was wondering if someone would want to buy it. I mean making a working prototype of an electronic device and making a production one are completely different things, and I'm wondering if finishing this is is worth the effort. The current state is:

What I plan to do, and know how to implement it :

- Receiver when connected via USB to a PC would show all recent lap-times.

What I would want to implement, but it is difficult:

- Bluetooth LE (smart) proximity profile. I see this like this: a group of friends on bikes gather on a parking lot, and are about to practice say GP8. Every rider has a bluetooth smart enabled cell phone with an application running. They stand in a queue couple meters / feet from the stopwatch and wait for their turn.
- When a rider approaches the device, It connects with his cell-phone, and rider's nick name gets stored in stop-watch memory. This way, lap-times are assigned to riders.

After training, owner of the device downloads the results, and post them to FB, or somewhere. Everybody knows their times.

Please tell me what you think. There are tons of work to do to make this come true, and I have (like all of us) only limited time. But every time I return home from gymkhana practice with friends I recall this project, and want to work on it.
Title: Re: Post your GP8 times
Post by: KrisCook on May 11, 2016, 10:46:52 AM
Hello fellow gymkhaners.

https://youtu.be/TOBAtMC-CO0

  I am trying to get motivation to polish my moto-gymkhana stopwatch project (https://hackaday.io/project/7606-moto-gymkhana-stopwatch). Right now it is quite usable for me (see video https://youtu.be/TOBAtMC-CO0), but I was wondering if someone would want to buy it. I mean making a working prototype of an electronic device and making a production one are completely different things, and I'm wondering if finishing this is is worth the effort. The current state is:
  • There are 2 devices : transmitter and receiver, and both have standard tripod mounts like cameras
  • 1000mAh batteries last for 5-10 hourts (? to be verified)
  • range to be verified. On cloudy weather I was able to achieve ~10m (30ft), but direct sun tends to make *lots* of trouble
  • Both devices are charged from micro USB type wall-warts

What I plan to do, and know how to implement it :

- Receiver when connected via USB to a PC would show all recent lap-times.

What I would want to implement, but it is difficult:

- Bluetooth LE (smart) proximity profile. I see this like this: a group of friends on bikes gather on a parking lot, and are about to practice say GP8. Every rider has a bluetooth smart enabled cell phone with an application running. They stand in a queue couple meters / feet from the stopwatch and wait for their turn.
- When a rider approaches the device, It connects with his cell-phone, and rider's nick name gets stored in stop-watch memory. This way, lap-times are assigned to riders.

After training, owner of the device downloads the results, and post them to FB, or somewhere. Everybody knows their times.

Please tell me what you think. There are tons of work to do to make this come true, and I have (like all of us) only limited time. But every time I return home from gymkhana practice with friends I recall this project, and want to work on it.

That sounds complicated!   Have you worked on it any more?

We just have a timer that trips when you cross the line to start the GP8 and stops counting when you come back across it.  And I think it was plenty expensive.    :o
Title: Re: Post your GP8 times
Post by: iwasz on May 31, 2016, 04:48:58 PM
Hi, yup, it works just as you described. I didn't solder the bluetooth, and I use USB only for charging for now. It works very well, and battery lasts for several hours (I didn't manage to fully discharge them during any of our training sessions which usually take 3-4h). On the video below you can see for a second or two how big (or small) it is (those 2 small boxes):

https://www.youtube.com/watch?v=g0jP8x3mUlI&feature=youtu.be&t=29 (https://www.youtube.com/watch?v=g0jP8x3mUlI&feature=youtu.be&t=29)

It's open source.
Title: Re: Post your GP8 times
Post by: KrisCook on June 01, 2016, 10:20:46 PM
Hi, yup, it works just as you described. I didn't solder the bluetooth, and I use USB only for charging for now. It works very well, and battery lasts for several hours (I didn't manage to fully discharge them during any of our training sessions which usually take 3-4h). On the video below you can see for a second or two how big (or small) it is (those 2 small boxes):

https://www.youtube.com/watch?v=g0jP8x3mUlI&feature=youtu.be&t=29 (https://www.youtube.com/watch?v=g0jP8x3mUlI&feature=youtu.be&t=29)

It's open source.

Killer!  You are a genius!

What kind of a place is that, where you are practicing?  Is it a race track of some kind?  Or a pull-off from the highway?