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Offline Coconut

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Re: Pulsing Front Brakes
« Reply #64 on: October 22, 2020, 01:13:15 pm »
Owners Manual Page 99 :
For full brake effectiveness always operate the front
brake lever and the rear brake pedal simultaneously.

I'm not a Physics Expert but I doubt very much whether the ABS system
has anything at all to do with the "pulsing" of the Front Brakes being discussed here,
despite Triumph referring to the Wheel Speed Sensors as "Pulsers" !  :087:

The ABS system activates at a point just prior to either wheel locking up,
when the brake fluid pressure being applied to the affected wheel is removed
to prevent it from slowing down further and locking up, and is then re-applied
by the ABS Pump to allow for continued braking. 

The process is repeated rapidly and will be felt by the rider
as a rapid "Pulsing" in the front brake lever or rear brake pedal, or both
as the ABS valves are automatically and rapidly opened and closed.

The Pulsing being discussed, as I understand it, is a less severe form,
which can occur if a Disc is warped, or is not running true to the axis of the wheel,
or possibly if there is wear in the front wheel bearings, or scalloping of the front tyre.

The physics of the <potentially> reduced braking effect on the right disc
due to only 2 of the 4 pistons in its caliper being operated by the front brake lever
compared to all 4 pistons in the left caliper is interesting, but again I doubt very much
whether this could result in any "Pulsing", though it may result in different rates of Brake Pad wear.


Offline earthman

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Re: Pulsing Front Brakes
« Reply #65 on: October 22, 2020, 01:50:45 pm »
I'm fully aware of what's stated in the handbook about braking but I still don't like it and would have preferred that Triumph/the nanny state would let us riders decided on which brake to use and when.

Offline Novocastrian

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Re: Pulsing Front Brakes
« Reply #66 on: October 22, 2020, 02:49:03 pm »
*Originally Posted by earthman [+]
I'm fully aware of what's stated in the handbook about braking but I still don't like it and would have preferred that Triumph/the nanny state would let us riders decided on which brake to use and when.

The linked braking system on my TTSE and my little Chinese scooter are brilliant. I don't mind it being enforced upon me that much, but I'm particularly happy it's being enforced on the myriad of clueless riders I see on sunny Sundays displaying their ineptitude at bike handling as they hurtle towards me....  :110:
Ken Hastie
TTSE, a handful of BSAs and an MGB

Offline Trophyed-Up

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Re: Pulsing Front Brakes
« Reply #67 on: October 23, 2020, 12:51:25 am »
I think that the linked braking systems were started as a safety measure because a lot of inexperienced riders would use the rear brake to stop instead of the front brake.  A lot of beginners and even some experienced riders are afraid of the front brakes.  On the Goldwing the linked brake operates the right front and rear brake pads.  The front brake operates both sets of front brake pads.  I would think the Trophy front brake lever operates all the front brake system.  My Trophy has the pulsing whether I'm using the rear brake or not. 

Offline Ernest T

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Re: Pulsing Front Brakes
« Reply #68 on: October 29, 2020, 04:20:37 am »
The linked brakes on my Honda ST-1300 and GL-1800 were both brilliant and both made by Nissen.  The Trophy isn't so great.

Offline earthman

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Re: Pulsing Front Brakes
« Reply #69 on: October 29, 2020, 07:38:54 am »
*Originally Posted by Trophyed-Up [+]
I think that the linked braking systems were started as a safety measure because a lot of inexperienced riders would use the rear brake to stop instead of the front brake.

Yes, I'm sure you are right there but wouldn't the correct response be to train the human instead?

Off topic I know but recently I heard of a kid getting cut in class by a bandsaw and now schools want to ban them. Another example of H&S madness in my opinion,....how on earth are the next generation going to gain any skills/do anything practical if they don't have a chance to master such tools in the first place!

Offline Coconut

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Re: Pulsing Front Brakes
« Reply #70 on: October 29, 2020, 07:57:29 am »
I learnt a valuable lesson may years ago -
There's no point continually moaning amid griping
about anything that I have no control over,
whether I agree with it or not.

The Trophy has Linked brakes - I don't have a problem with them,
but even if I did I couldn't do anything about it,
except maybe change to a different bike.

The Off-Topic Bandsaw case, is a perfect example of why H&S is needed.

It appears to have failed in that incident, but without any safety measures,
( which includes training ), the likelihood of further avoidable injuries will remain.

Perhaps a New Topic is needed for such H&S Issues and gripes,
so the Topic of "Pulsing Brakes" can continue here ?


Offline earthman

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Re: Pulsing Front Brakes
« Reply #71 on: October 29, 2020, 11:20:04 am »
I wasn't suggesting that H&S isn't needed, it's just become way over the top shall we say, so much so that it's almost impossible for the site guys at my work place to actually do some jobs they've been sent to do.