tractioncontrol?

[burn1986]

Hmmm, wouldn't a fly wheel weight do the same thing?

[Micahdogg]

When they zoomed in on his swingarm, you could see a bung welded to his swingarm right above the axle nut.  It looked like a typical abs style magnet sensor could mount to it with one bolt, and that it was lined up with the brake rotor mounting bolts.  It wasn't installed for the main event, so I don't see how they can call it traction control.

I'm betting they were gathering data, then adjusting the jetting in the pits, which I don't see a problem with.  I'm also with JETZ, if Yamaha came out with a factory form of traction control, that would be cool too.

 

[snook620]

And does all this make you faster?

A rider of Stewarts Caliber......absolutely it will make you faster. Technology like this is going to be seen more and more the sport is evolving just like any other. The teams with the money will work on advantages in the "grey areas" of the rule book.

[SachsGS]

A traction control device could work in conjunction with ignition timing and powervalve position.The only advantage a 4T has over a 2T (cc for cc) is traction - traction control on a 2T would eliminate this.

When the big "4" want traction control the AMA will legalize it.

JS should consider politics with an answer like that.

[factoryX]

Hell, if the big four wanted to run nitro...

[MyckMcClung]

I'll bet $20 it was a digital temperature and pressure sensor on the caliper, and the device on the rotor was a speed sensor that clocked wheel lock up and deceleration speeds. Obviously they are testing a new caliper.

[riffraff]

I'll bet $20 it was a digital temperature and pressure sensor on the caliper, and the device on the rotor was a speed sensor that clocked wheel lock up and deceleration speeds. Obviously they are testing a new caliper.

Check out Stewart's reply and reaction to Erin Bates asking about the device on his bike at 2:12

http://www.speedtv.com//video/moto-racing/supercross/sx-phoenix-recap-2011-752459780001/1

[Charles Owens]

A Tweet an hour ago from Chad Reed.. Who wants to take bets on how soon AMA will pass another rule change? 

CRtwotwo Chad Reed
Just got educated on this whole TC dealio:) let's just say there is endless possibilities. the AMA should just legalize it right now IMO...
1 hour ago Favorite Retweet Reply

[SwapperMX]

A Tweet an hour ago from Chad Reed.. Who wants to take bets on how soon AMA will pass another rule change? 

CRtwotwo Chad Reed
Just got educated on this whole TC dealio:) let's just say there is endless possibilities. the AMA should just legalize it right now IMO...
1 hour ago Favorite Retweet Reply

 Now that is very interesting !! I think the AMA should do the exact opposite. Make sure any type of traction control is absolutely illegal.

[2T Institute]

With TC banned it becomes an 'arms race' and for everyone it gets evermore expensive in each round of catch me if you can. With TC being legal the costs of the systems come down.As the developers can sell systems to anyone that wants them, rather than have to develop costly methods of hiding the system.

[MyckMcClung]

I thought 4strokes were traction  control

[snook620]

Everyone knows what it was now. Stewart won that race fair and square per the current rules. The guy worked hard, came back after a year off to get his 38th win only to be accused of cheating....his reaction was tame compared to how mine would have been.

[MXPAD]

I suspect its a wind up, why would Bubba put himself in a position to accused of cheating, and when your laying flat over a table top does it switch the engine off, or does it have some way of knowing its in the air, or indeed Panic revving,..

Good Luck

[MyckMcClung]

Bubba could whoop those guys riding an 81 kx125

[CCOADY454]

Much ado about nothing as far as I can see.It's almost guaranteed it's just data acquisition.Honda did it for years on their CR's.
In order to be a traction control system it would have to be hooked up through the trans in order to have a way to regulate traction.It would then require a suitable cpu to run it as well as related wiring and such.As far as that goes,slipper clutches are a form of traction control(for that matter,what about a Rekluse?) but to do it electronically would require a solenoid of some sort to slip the clutch in low traction situations.If it was an ABS system,it would require a cpu as well and a pump set up to regulate brake pressure.Because MX sometimes requires one to slip,slide and spin,the chances anyone will try to gear up an electronic traction control system is slim to none-and it's unlikely anyone would want the weight penalty-or a slipping clutch on a 4t.
If it's not data acquisition,it wouldn't surprise me  if it did nothing at all other than to try to get into the heads of the other riders and teams.In Pro racing,it wouldn't be the first time.

It could very easily be hooked to the ECU and be used exclusively for the start in order to help get the holeshot.  I'm sure they know the wheelspeed at any given RMP, so if it exceeds the known number, the ECU is triggered to retard the ignition timing slightly.  It's probably set to shut off and clear itself after the start because it would affect his jumps if it acted in mid-air.  This is just a scanario that I thought out, not saying it's what he has on his bike (JS).  But he did get the holeshot, and whith less wheelspin and equal power as everyone else, he'd have a better chance of getting it every time.  Things that make you go hmmmmmm....  A holeshot exclusive ECU traction control device.  When JS7 is out front early, he almost always wins.  If he starts off in the pack, he either crashes or dosen't win.