F1 Caliper Piston...
#1
07-21-2006, 11:30 AM
#4
07-21-2006, 04:39 PM
#7
07-22-2006, 01:10 AM
RE: F1 Caliper Piston...
Thanks!
I am guessing that the brakes on the F1 work well, but need more a lot more effort than the newer sport bikes.
(The master cylinder : caliper piston ratio is 14.8:1, just like my 86 VFR.BTW, the F4i ratio is 22:1)
Has anyone tried a 1/2" master cylinder on the F1? This would make the bike stop with less effort, but slightly more lever travel.
-Frank
I am guessing that the brakes on the F1 work well, but need more a lot more effort than the newer sport bikes.
(The master cylinder : caliper piston ratio is 14.8:1, just like my 86 VFR.BTW, the F4i ratio is 22:1)
Has anyone tried a 1/2" master cylinder on the F1? This would make the bike stop with less effort, but slightly more lever travel.
-Frank
#8
07-22-2006, 02:10 AM
RE: F1 Caliper Piston...
before i changed my master i had never noticed it needing that much more effort until the pads were wearing thin or the fluid needing to be replaced. as long as i had made sure that the system was completely blead, it always felt rock hard.
i replaced my master with a 2000 yamaha r6 unit (don't ask why i didn't use a later honda part, i don't know). the piston is 14mm but as far as lever travel goes, i'm using crg adjustables. it works quite well. also of note is that i changed out all my brake lines for ss braided lines. these lines over stock even with stock master was a great improvement in feel.
where abouts did you find the caliper piston ratio?
#9
07-22-2006, 06:56 PM
#10
07-22-2006, 08:03 PM
RE: F1 Caliper Piston...
ORIGINAL: michigan_313
before i changed my master i had never noticed it needing that much more effort until the pads were wearing thin or the fluid needing to be replaced. as long as i had made sure that the system was completely blead, it always felt rock hard.
i replaced my master with a 2000 yamaha r6 unit (don't ask why i didn't use a later honda part, i don't know). the piston is 14mm but as far as lever travel goes, i'm using crg adjustables. it works quite well. also of note is that i changed out all my brake lines for ss braided lines. these lines over stock even with stock master was a great improvement in feel.
where abouts did you find the caliper piston ratio?
before i changed my master i had never noticed it needing that much more effort until the pads were wearing thin or the fluid needing to be replaced. as long as i had made sure that the system was completely blead, it always felt rock hard.
i replaced my master with a 2000 yamaha r6 unit (don't ask why i didn't use a later honda part, i don't know). the piston is 14mm but as far as lever travel goes, i'm using crg adjustables. it works quite well. also of note is that i changed out all my brake lines for ss braided lines. these lines over stock even with stock master was a great improvement in feel.
where abouts did you find the caliper piston ratio?
As for the ratio it is a simple calculation:
Master cylinder piston area / caliper piston area
So 14mm dia = .551" dia, = .239 in2
The diameter of the piston is 1.06", ans we have a total of 4 = 3.53in2 total piston area.
3.53/.230 = 14.76
Look here for more info: http://www.vintagebrake.com/mastercylinder.htm