gggrrrr, brakes - how would air in the system affect brake ? - SV650.org

19-06-06, 07:05 PM

hi there boys,
after fitting braided hoses, bled the system.
something feels quite (not right)
there is a great bite, but you need to pull the lever hard to get the brakes to progress.

hmm, mabe air in the system me thinks. but im sure there shouldnt be.

so i get the brake cleaner out, clean up my calipars, pistons and pads. copper grease up my pins (this time i was surgical, i torqued everything up correctly)

cleaned up the master cyclinder area , checking the whole system for leaks.

checked fluid levels,

now i find that my brakes are binding.
im pretty sure there isnt any air in the system . . . would trapped air cause the brakes to bind ? or is there something else thats gone wrong here ?

19-06-06, 07:07 PM

btw its def the brakes that are binding.

i found no evidence of sticky pistons.
im gonna take it out for a ride later and find out which calipar is causing the problem (its def the calipars, the wheel spins fine without the calipars attached.

TSM · 19-06-06, 08:48 PM

Did you put new pads in recently, what is the disks edge like?

Speedy · 19-06-06, 08:48 PM

Air in the brake hydraulics will cause:

Spongy feel to pedal/lever

Excessive movement to pedal/lever

Never heard of air causing bind though!

Thing is,Air/Gas is compressable,Brake fluid or ANY fluid for that matter isn't.Thats why brakes feel spongy if air in the system!

I would say something mechanical is at fault if you have a bind problem.

19-06-06, 09:27 PM

Quote:

Originally Posted by TSM

Did you put new pads in recently, what is the disks edge like?

not new pads, disc is ok.
if there was a problem with the discs, it would have been noticable before fitting the hoses and servicing the calipars surely ?

19-06-06, 09:29 PM

Quote:

Originally Posted by Speedy

Air in the brake hydraulics will cause:

Spongy feel to pedal/lever

Excessive movement to pedal/lever

Never heard of air causing bind though!

Thing is,Air/Gas is compressable,Brake fluid or ANY fluid for that matter isn't.Thats why brakes feel spongy if air in the system!

I would say something mechanical is at fault if you have a bind problem.

they do feel spongy, infact they feel kinda cr*p

the bit is great, but any more progress after just isnt that noticable.

Speedy · 19-06-06, 09:42 PM

You have air in them then!

What about the binding?

19-06-06, 09:47 PM

yep, there def binding.

i think its the left calipar, yet the pistons are clean, and move freely.

ill try another set of brake pins to see if that helps.

Speedy · 19-06-06, 09:50 PM

Yes but do the pads move freely?

19-06-06, 09:55 PM

thats a good question, and something i didnt check.

ill find out wednesday when i have em off.,

hope i havent done something silly like put the pads in the wrong way round.

just out of interest, is it an easy job to fit new brake seals ?

19-06-06, 07:05 PM	#1
Warren Guest Posts: n/a	gggrrrr, brakes - how would air in the system affect brake ? hi there boys, after fitting braided hoses, bled the system. something feels quite (not right) there is a great bite, but you need to pull the lever hard to get the brakes to progress. hmm, mabe air in the system me thinks. but im sure there shouldnt be. so i get the brake cleaner out, clean up my calipars, pistons and pads. copper grease up my pins (this time i was surgical, i torqued everything up correctly) cleaned up the master cyclinder area , checking the whole system for leaks. checked fluid levels, now i find that my brakes are binding. im pretty sure there isnt any air in the system . . . would trapped air cause the brakes to bind ? or is there something else thats gone wrong here ?

19-06-06, 08:48 PM	#3
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Did you put new pads in recently, what is the disks edge like? __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

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19-06-06, 07:07 PM	#2
Warren Guest Posts: n/a	btw its def the brakes that are binding. i found no evidence of sticky pistons. im gonna take it out for a ride later and find out which calipar is causing the problem (its def the calipars, the wheel spins fine without the calipars attached.

19-06-06, 08:48 PM	#4
Speedy Member Mega Poster Join Date: Apr 2006 Location: Biggin Hill,Kent Posts: 1,074	Air in the brake hydraulics will cause: Spongy feel to pedal/lever Excessive movement to pedal/lever Never heard of air causing bind though! Thing is,Air/Gas is compressable,Brake fluid or ANY fluid for that matter isn't.Thats why brakes feel spongy if air in the system! I would say something mechanical is at fault if you have a bind problem.

19-06-06, 09:42 PM	#7
Speedy Member Mega Poster Join Date: Apr 2006 Location: Biggin Hill,Kent Posts: 1,074	You have air in them then! What about the binding?

19-06-06, 09:47 PM	#8
Warren Guest Posts: n/a	yep, there def binding. i think its the left calipar, yet the pistons are clean, and move freely. ill try another set of brake pins to see if that helps.

19-06-06, 09:50 PM	#9
Speedy Member Mega Poster Join Date: Apr 2006 Location: Biggin Hill,Kent Posts: 1,074	Yes but do the pads move freely?

19-06-06, 09:55 PM	#10
Warren Guest Posts: n/a	thats a good question, and something i didnt check. ill find out wednesday when i have em off., hope i havent done something silly like put the pads in the wrong way round. just out of interest, is it an easy job to fit new brake seals ?