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ABS check and testing

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Val
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Joined: 03 Nov 2012
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PostPosted: 11:27 - 03 Nov 2016    Post subject: ABS check and testing Reply with quote
Do you know a garage with equipment that can test your ABS brakes? I have seen plenty old fashioned rollers brake test machines.

Around London in the South East.

I want to test my bike ABS brakes in a garage in a controlled environment.
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davebike
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PostPosted: 07:30 - 04 Nov 2016    Post subject: Reply with quote
I don't think there is such kit

What bike? what issues ?
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Rogerborg
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Joined: 26 Oct 2010
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PostPosted: 08:51 - 04 Nov 2016    Post subject: Reply with quote
davebike wrote:
What bike? what issues ?


Val wrote:
Few days ago has gone through roundabout I mean literally. Few road signs and a somersault later I've landed on the grass. Bike also has landed. On my back.

Apparently I've been 5 minutes LOC. Paramedics have tied me to a stretcher and despite my protest cut off all my gear.

I am fine nothing broken. Can't do paint left handed.

Nobody else involved or injured. Moral of the story - do not ride like a dick Laughing

And ABS brakes don't work well on grass.

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Val
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Joined: 03 Nov 2012
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PostPosted: 18:57 - 04 Nov 2016    Post subject: Reply with quote
davebike wrote:
I don't think there is such kit

What bike? what issues ?


No issue just want to test my brakes. The normal ones you can use brake roller machines.

Is there anything that can test Abs?
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Nobby the Bastard
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Joined: 16 Aug 2013
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PostPosted: 19:05 - 04 Nov 2016    Post subject: Reply with quote
Val wrote:
davebike wrote:
I don't think there is such kit

What bike? what issues ?


No issue just want to test my brakes. The normal ones you can use brake roller machines.

Is there anything that can test Abs?


Braking hard on a shitty surface?
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Hong Kong Phooey
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Joined: 30 Apr 2016
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PostPosted: 19:18 - 04 Nov 2016    Post subject: Reply with quote
A single dyno won't work other than to test the mechanical braking.
ABS is generally looking at difference between wheel speeds and if one stopped spinning it would momentarily release pressure to that or both wheels.

You would need to rig something dangerous to raise it off the ground on straps or similar then run the engine in gear, spin front wheel at speed and apply a (linked?) brake.

But having no reference to reality the results would be meaningless. Normally components are tested individually or are diagnosed by ABS ecu.

What's the actual issue?
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Val
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Joined: 03 Nov 2012
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PostPosted: 20:07 - 04 Nov 2016    Post subject: Reply with quote
Hong Kong Phooey wrote:
A single dyno won't work other than to test the mechanical braking.
ABS is generally looking at difference between wheel speeds and if one stopped spinning it would momentarily release pressure to that or both wheels.

You would need to rig something dangerous to raise it off the ground on straps or similar then run the engine in gear, spin front wheel at speed and apply a (linked?) brake.

But having no reference to reality the results would be meaningless. Normally components are tested individually or are diagnosed by ABS ecu.

What's the actual issue?


There is no issue. Just the bike is in a garage been repaired and I want to be sure the brakes will work fine.

Just read article in the latest MSL that if the Abs pump is not connected properly the brakes will work fine except the Abs.

I really want to be sure it works.
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Val
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PostPosted: 20:12 - 04 Nov 2016    Post subject: Reply with quote
Nobby the Bastard wrote:
Val wrote:


No issue just want to test my brakes. The normal ones you can use brake roller machines.

Is there anything that can test Abs?


Braking hard on a shitty surface?


Tried that. Lead to a somersault.

Any way to test it without me on the bike?
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 20:56 - 04 Nov 2016    Post subject: Reply with quote
Val wrote:


Any way to test it without me on the bike?


Get someone else to try it.
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Hong Kong Phooey
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PostPosted: 21:29 - 04 Nov 2016    Post subject: Reply with quote
What bike? I'm not 100% but if there's a fault then surely some indication on the dash is given. Otherwise it's presumed to be working.

As above, gravel and grass and low speed can give isssues with some ABS.
It's a supplementary system, it won't save everyone everytime but will shorten braking distance and preserve more control especially in the wet for most people.
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Nobby the Bastard
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PostPosted: 21:53 - 04 Nov 2016    Post subject: Reply with quote
Hong Kong Phooey wrote:
but will shorten braking distance and preserve more control especially in the wet for most people.


Some of us just rely on our braking technique. I've never owned a vehicle with ABS.
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Hong Kong Phooey
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PostPosted: 22:21 - 04 Nov 2016    Post subject: Reply with quote
Nobby the Bastard wrote:
Hong Kong Phooey wrote:
but will shorten braking distance and preserve more control especially in the wet for most people.


Some of us just rely on our braking technique. I've never owned a vehicle with ABS.


True, but in a panic braking scenario you'd be better off with than without in most circumstances. Saying that, the CBR doesn't have it either. Always better to avoid any scenario happening, obviously.

Latest bike ABS and other electronic riding aids are starting to give the edge over what even the best race hardened riders can offer without them. For the average Joe on the street I've admitted defeat long ago, rider electronic aids is happening whether we like it or not.
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iooi
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PostPosted: 07:51 - 05 Nov 2016    Post subject: Reply with quote
Hong Kong Phooey wrote:


As above, gravel and grass and low speed can give isssues with some ABS.


The whole point of ABS is to stop the wheel locking up. Given all the above are low grip surfaces. It is not a ISSUE, it is how ABS is designed to work.

What you really need is the option to turn it off. As driving on certain surfaces it gives a longer stopping distance.
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thepuma
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PostPosted: 08:00 - 05 Nov 2016    Post subject: Reply with quote
Surely the best way is on a wet day to keep stopping a number of time.. but each time gradually pressing hard and harder on the brakes..if you do it gradually and youre getting to the point where you are feeling the front or back end lock then it's safe to say the ABS ain't working.

I don't think anyone means to test it by ramming the front brake on as hard as you can in the wet first time so you end up doing an endo/dive over the bars if the ABS doesnt work.
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Wafer_Thin_Ham
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PostPosted: 08:05 - 05 Nov 2016    Post subject: Reply with quote
iooi wrote:


The whole point of ABS is to stop the wheel locking up. Given all the above are low grip surfaces. It is not a ISSUE, it is how ABS is designed to work.

What you really need is the option to turn it off. As driving on certain surfaces it gives a longer stopping distance.


I sort of see what you mean, but you'd still need enough friction to get the wheel spinning more quickly again. Hence why ABS isn't very effective on ice, or super wet grass for that matter.

If the front wheel can't get back up to near the road speed again and continues to slide, you're still going down.
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owl
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Joined: 21 Oct 2016
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PostPosted: 08:13 - 05 Nov 2016    Post subject: Reply with quote
When I wanted to test and get a feel for the ABS I went to an empty parking lot on a Sunday and messed around doing emergency stops basically testing where the biting point was for it to kick in. Fortunately even with a few close calls since then I haven't had to actually use it, but like others have said it's not designed to work on grass Confused
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