Discs and brake calipers
Discussion
On a facebook group i am on there is a question of safety about fixed (none sliding) calipers and none floating calipers fitted to a ‘95 blade , seems a 17 inch front wheel has been fitted over the original 16 , never heard of this being an issue as the 4 piston calipers will self centre surely?
bimsb6 said:
... fixed (none sliding) calipers and none floating calipers ...
Do you mean fixed (i.e. opposed-piston) calipers and non-floating discs?Anyway, I can't think of any reason why opposed-piston calipers shouldn't be used with fixed discs (provided that the discs & calipers are lined up, obviously).
Norton Commando brakes, the Lockheeds on the Triumph Bonneville/Trident, early Brembos on Italian bikes were all opposed piston calipers and non-floating discs.
I think Harleys still have opposed piston calipers and non-floating discs.
Japanese bikes were using floating discs in the early '80s, not sure offhand if there were any with opposed piston calipers and non-floating discs.
gareth_r said:
Do you mean fixed (i.e. opposed-piston) calipers and non-floating discs?
Anyway, I can't think of any reason why opposed-piston calipers shouldn't be used with fixed discs (provided that the discs & calipers are lined up, obviously).
Norton Commando brakes, the Lockheeds on the Triumph Bonneville/Trident, early Brembos on Italian bikes were all opposed piston calipers and non-floating discs.
I think Harleys still have opposed piston calipers and non-floating discs.
Japanese bikes were using floating discs in the early '80s, not sure offhand if there were any with opposed piston calipers and non-floating discs.
Exactly that ,calipers bolted directly to the fork legs (no sliding pins) and solid non floating discs , it had a load of them wailing and suggesting not using the bike as its “dangerous”and to change the discs straight away .Anyway, I can't think of any reason why opposed-piston calipers shouldn't be used with fixed discs (provided that the discs & calipers are lined up, obviously).
Norton Commando brakes, the Lockheeds on the Triumph Bonneville/Trident, early Brembos on Italian bikes were all opposed piston calipers and non-floating discs.
I think Harleys still have opposed piston calipers and non-floating discs.
Japanese bikes were using floating discs in the early '80s, not sure offhand if there were any with opposed piston calipers and non-floating discs.
Why do they believe that it's dangerous? It might not be as good, because, as I understand it, the main purpose of a 2-piece disc is to minimise distortion.
This is what EBC has to say >>> https://ebcbrakes.com/articles/the-facts-about-flo...
EBC make the point that that the discs DO NOT float axially:
Any motorcycle rotor built with axial float - often described by people as a self centering rotor - is also doomed to failure. The pad and piston knock back effect of a rotor with axial float is simply a killer and causes sponginess and can render brake levers coming right back to the motorcycle handlebar when trying to re-connect the “knocked back” pad with the rotor under braking. Not good at all! So zero axial float is needed or desirable in any type of rotor.
This is what EBC has to say >>> https://ebcbrakes.com/articles/the-facts-about-flo...
EBC make the point that that the discs DO NOT float axially:
Any motorcycle rotor built with axial float - often described by people as a self centering rotor - is also doomed to failure. The pad and piston knock back effect of a rotor with axial float is simply a killer and causes sponginess and can render brake levers coming right back to the motorcycle handlebar when trying to re-connect the “knocked back” pad with the rotor under braking. Not good at all! So zero axial float is needed or desirable in any type of rotor.
gareth_r said:
Why do they believe that it's dangerous? It might not be as good, because, as I understand it, the main purpose of a 2-piece disc is to minimise distortion.
This is what EBC has to say >>> https://ebcbrakes.com/articles/the-facts-about-flo...
EBC make the point that that the discs DO NOT float axially:
Any motorcycle rotor built with axial float - often described by people as a self centering rotor - is also doomed to failure. The pad and piston knock back effect of a rotor with axial float is simply a killer and causes sponginess and can render brake levers coming right back to the motorcycle handlebar when trying to re-connect the “knocked back” pad with the rotor under braking. Not good at all! So zero axial float is needed or desirable in any type of rotor.
No idea , calls for rejecting goods and demanding new discs etc etc , laughable .This is what EBC has to say >>> https://ebcbrakes.com/articles/the-facts-about-flo...
EBC make the point that that the discs DO NOT float axially:
Any motorcycle rotor built with axial float - often described by people as a self centering rotor - is also doomed to failure. The pad and piston knock back effect of a rotor with axial float is simply a killer and causes sponginess and can render brake levers coming right back to the motorcycle handlebar when trying to re-connect the “knocked back” pad with the rotor under braking. Not good at all! So zero axial float is needed or desirable in any type of rotor.
Gassing Station | Biker Banter | Top of Page | What's New | My Stuff