Disk Brake Pressure

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The first photo shows the position of my lever when free play ends and brake pressure begins. The second photo is where it ends. This is achieved with a re-sleeved master cylinder. The brake has a very progressive feel and is reasonably effective in stopping power. There is no air in the line. I know Les says his is different but I can't explain his shorter lever movement. Mine has a beautiful non wooden feel.

Phil
 

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Thanks all,

I ended up clamping the front lever up overnight and instantly got more pressure, it really does work!.
I then re bled and couldn't see any air, re tightened all connections "Think it may have been slightly leaking at the pressure switch"
clamped the lever again another night and it seems to have been good ever since. Have the same travel as Phils pics now

Going through same process with the rears now
 
CHARGER said:
Thanks all,

I ended up clamping the front lever up overnight and instantly got more pressure, it really does work!.
I then re bled and couldn't see any air, re tightened all connections "Think it may have been slightly leaking at the pressure switch"
clamped the lever again another night and it seems to have been good ever since. Have the same travel as Phils pics now

Going through same process with the rears now
Click to expand...

Apparently some guys actually prefer a "wooden" feeling brake. Beyond my comprehension but each to his own I guess. You could look at different pads and skimming the chrome off your disc for further improvements. It will never equal a modern brake in stopping power but a whole lot better than it was in 1975.

Phil
 
CHARGER said:
Thanks all,

I ended up clamping the front lever up overnight and instantly got more pressure, it really does work!.
I then re bled and couldn't see any air, re tightened all connections "Think it may have been slightly leaking at the pressure switch"
clamped the lever again another night and it seems to have been good ever since. Have the same travel as Phils pics now

Going through same process with the rears now
Click to expand...

IMO, Probably wont work on the rear cos the M/C is lower than the Slave/C... Its all about allowing the very small air bubbles to rise via gravity/settling within the oil and takes 8-12hrs dependant on variables. Within the rears design, any aireated oil, if thats the right word. air with rise to the top of hyd system and if there is a loop/hipoint in the rubber hose, all effort will be for none, cos the "air" will settle at the highest point..........

I hope im wrong and you succeed... Im not sure but its logical to me.......
 
phil yates said:
Apparently some guys actually prefer a "wooden" feeling brake.
Click to expand...

I think what most 'guys' prefer, is a brake without air in the system. :roll:
 
L.A.B. said:
phil yates said:
Apparently some guys actually prefer a "wooden" feeling brake.
Click to expand...

I think what most 'guys' prefer, is a brake without air in the system. :roll:
Click to expand...

Too right Les. But apparently the difference between that and a progressive brake in feel is beyond some. If you don't know the difference……..well, I guess you don't know the difference.

Phil
 
phil yates said:
L.A.B. said:
phil yates said:
Apparently some guys actually prefer a "wooden" feeling brake.
Click to expand...

I think what most 'guys' prefer, is a brake without air in the system. :roll:
Click to expand...

Too right Les. But apparently the difference between that and a progressive brake in feel is beyond some. If you don't know the difference……..well, I guess you don't know the difference.
Click to expand...

It's that Royal 'you' again! :roll:

I think most of 'us' do know the difference, including CHARGER which is presumably why he posted in the first place, he then followed some good advice and has (hopefully) now got all air out after somebody continuing to suggest that it was probably OK as it was.
After all that, looking at your photos, I'd say there wasn't all that much difference in lever travel between my apparently "wooden" :? brake and your "progressive" one!
 
phil yates said:
L.A.B. said:
phil yates said:
Apparently some guys actually prefer a "wooden" feeling brake.
Click to expand...



Too right Les. But apparently the difference between that and a progressive brake in feel is beyond some. If you don't know the difference……..well, I guess you don't know the difference.
Click to expand...

It's that Royal 'you' again! :roll:

I think most of 'us' do know the difference, including CHARGER which is presumably why he posted in the first place, he then followed some good advice and has (hopefully) now got all air out after somebody continuing to suggest that it was probably OK as it was.
After all that, looking at your photos, I'd say there wasn't all that much difference in lever travel between my apparently "wooden" :? brake and your "progressive" one!
Click to expand...

There is no "royal" me Les. From Charger's original photo I said my lever movement was similar and my system definitely has no air in it. But everyone else (including you) said the movement was excessive. So I left everyone to help by suggesting bleeding techniques. You really need to "feel" a brake to determine what it is doing and whether or not air is in the line. Sounds like Charger did have air in the line. But now he has a lever movement similar to mine and you are now saying you do too. "Wooden" as I always understood it, was a term given to the Commando disc brake feel or lack of because the lever moves through "free play" if you like, to a position where braking commences and the lever can't be pulled further back. You can't "progressively" pull the lever back any further as you increase braking action, just apply more pressure, like you would against a piece of wood.

One chap (not you) said he had the perfect wooden feeling brake, so I presumed he preferred it that way. My second MkIII with no MC mods has exactly that feel and its stopping power is comparatively poor. So I will be re-sleeving its MC as well because I hate wooden brakes.

I had a wooden brake on my billy cart and it was crap too. :)

Phil
 
phil yates said:
There is no "royal" me Les.
Click to expand...
Not 'you' yourself. The royal you.
http://www.wordwizard.com/phpbb3/viewto ... f=7&t=6811


phil yates said:
From Charger's original photo I said my lever movement was similar and my system definitely has no air in it
Click to expand...

Indeed, according to your initial response you did give the distinct impression that CHARGER's brake's range of lever movement was comparable to your own wonderful progressive brake, but somehow your photos appear to tell a different story, as the range of lever movement they show seems nowhere near as pronounced as you'd led us to believe.

No doubt you will want to have the last word and then hopefully, we can put it to bed and move on.
 
L.A.B. said:
phil yates said:
There is no "royal" me Les.
Click to expand...
Not 'you' yourself. The royal you.
http://www.wordwizard.com/phpbb3/viewto ... f=7&t=6811


phil yates said:
From Charger's original photo I said my lever movement was similar and my system definitely has no air in it
Click to expand...

Indeed, according to your initial response you did give the distinct impression that CHARGER's brake's range of lever movement was comparable to your own wonderful progressive brake, but somehow your photos appear to tell a different story, as the range of lever movement they show seems nowhere near as pronounced as you'd led us to believe.

No doubt you will want to have the last word and then hopefully, we can put it to bed and move on.
Click to expand...

Last word? Well I'd first like to further hear from Charger how he likes his own wonderful progressive brake out on the road. So don't lock the topic yet Les. The idea was to help Charger, not for me to have to explain what a wonderful progressive brake feels like. Not to those in the know anyway.

Charger may have further issues and questions to ask. I think he should have the last word.

Phil
 
Be a little while before I get it out for a good run, tuning issues at the mo, will report back.

Dunno what I have started! :shock:
 
BrianK said:
Bungee that lever back against the handlebar overnight. Should be substantially firmer in the morning - IF your problem is air in the system.
Click to expand...

+1
That's what I do (heavy rubber bands around brake lever/handlebar) and it works everytime.
 
SGOUD2 said:
BrianK said:
Bungee that lever back against the handlebar overnight. Should be substantially firmer in the morning - IF your problem is air in the system.
Click to expand...

That's what the girl said to the sailor.

+1
That's what I do (heavy rubber bands around brake lever/handlebar) and it works every time.

That's what the sailor said to the girl.
Click to expand...
 
As Phil doesn't understand the WOODEN brakes on his Nortons should be spelt WOULDN'T BRAKE !

Chili
 
Chili said:
As Phil doesn't understand the WOODEN brakes on his Nortons should be spelt WOULDN'T BRAKE !

Chili
Click to expand...

But I did get it Chili.
I was hoping Chris wooden post.

Phil
 
Phil Yates says he's got a real wizard working on his mk111
Disk Brake Pressure


But L.A.B says the front brake will still seem wooden
Only that bird over there has seen it run.
Disk Brake Pressure


And she's speechless!
 
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