ABS and stoppies, burnouts, etc. | GTAMotorcycle.com

ABS and stoppies, burnouts, etc.

JP0160

JP0160

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I did some emergency braking the other day in an empty parking lot, just to test my ABS. I jammed on my rear brake and it felt pretty good. Definitely noticeable but not uncomfortable like it feels in a car (I HATE ABS in cars). It got me thinking of a couple things...

AFAIK ABS on a bike momentarily STOPS braking pressure, as opposed to applying it. Are you still able to do a stoppie on a bike with ABS on both wheels? Would it sense the front tire slowing down faster than the rear and ABS would kick in? Would it kick in during a wheelie if you touch the rear brake?

What about a burnout? Does it somehow sense the bike isn't moving and turn off?

Don't worry, my hooligan mode hasn't been fully activated yet and I don't plan on testing these questions myself anytime soon.
 
AFAIK ABS is centered around comparing wheel speed while braking, in order to determine wheel slip to activate the system.

When ur doing a burnout, your wheel is already locked, so it won't need to activate (assuming ABS equipped bikes have speed sensors on both wheels)

I remember reading an ABS article when Honda first launched theirs, and the main photo had the back-wheel in the air while the tester was braking on a wet surface - for an actual stoppie, you're supposed to tip the weight of the bike forward to initiate it (and still avoid any wheel slip), ABS wouldn't kick in unless wheelslip was detected. I would guess that ABS would help you when learning how to do stoppies, but JohnnyP would be better at answering that...

I <3 ABS in all types of vehicles. Its TC (AKA the fun stopper) that I despise.
 
Hmm, the whole "wheelslip being detected" thing is what gets me. I thought the ABS is activated during braking when it senses one tire spinning slower than the other?
 
Depends on the system as far as stoppies go. I know the zx10 won't let you because it takes the speed of the wheels into account. If the rear lifts the abs kicks in.
 
I thought some bikes (S1000RR?) were incorporating gyros into their abs/tc to allow you to control the angle of the bike. Fundamentally it shouldn't be that hard for the computers to make you look like a rockstar. They may choose not to as obviously the bike has no control over the steering angle so things could go really wrong (although differential pressure on the front discs might swing the bike back???).

Be careful practising with ABS, on some bikes it doesn't arm below a certain speed, it would suck to dump the bike while trying to see how your abs worked.
 
Varies between systems. Kawasaki KIBS does not cycle the brakes "on" and "off" like older systems do - it modulates the brake pressure. Some of them take into account rear wheel lift, others don't. Systems that purely rely on wheel speed might not positively prevent rear wheel lift since what happens with rear wheel speed when it comes off the ground is not guaranteed, particularly if the transmission is in gear and the clutch is engaged. Some ABS systems disengage when the front wheel speed is below some very low speed and don't care about the rear wheel speed (thus, it is possible to do a stationary burnout, although a rolling burnout will probably freak it out). Others freak out if they see anything out of bounds.
 
Great thread, I was thinking about this yesterday. Also thinking if entering a curve too fast and start braking in a curve with F or R brakes, can the Yamaha slide control help keep you stay in control?

In terms of stoppies on ABS equipped bikes, it is doable ONLY on bikes without a sensor to counteract the lifting of rear wheels. ABS alone will not stop you from doing stoppies.
 
I think ABS on cars is OK.
But ABS on bikes is a crime.


JP0160 said:
I did some emergency braking the other day in an empty parking lot, just to test my ABS. I jammed on my rear brake and it felt pretty good. Definitely noticeable but not uncomfortable like it feels in a car (I HATE ABS in cars). It got me thinking of a couple things...

AFAIK ABS on a bike momentarily STOPS braking pressure, as opposed to applying it. Are you still able to do a stoppie on a bike with ABS on both wheels? Would it sense the front tire slowing down faster than the rear and ABS would kick in? Would it kick in during a wheelie if you touch the rear brake?

What about a burnout? Does it somehow sense the bike isn't moving and turn off?

Don't worry, my hooligan mode hasn't been fully activated yet and I don't plan on testing these questions myself anytime soon.
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