Brake stuck

[SinFilled]

No it's like $80 just for piston seals. Pistons not included. I didn't even bother checking what's the price for pistons after I heard the price for the seals.

Hahaha

 

 

$80 just for seals! T_T haha if working still alrite la,but if still studying huh,where to get that kinda money maintain bike haha

 

Well you don't have to use your brakes at all to have it heated up because your pads and disc are in constant contact. And not having a perfectly flat disc to the pads does add to the rubbing effect.

 

I speak from real life experience whereby I knew the my calipers are seizing up but haven't had the time to fix it yet. So I rode without using the front brakes at all. 15 mins of riding and I can start to feel the bike having a bit of 'braking' at the front.

 

 

 

So could this be the problem for my bike oso? coZ yest i rode to work without using rear brake... when after i reach work around 10 - 15mins oso can feel the braking effect haha by the time i reach carpark totally cannot push liao haha

[SinFilled]

did u mention my name or u meant u "LL"?

lol doesn't matter..

I still don't get it how u actually can whack ur rear brake... unless u kick reverse pattern

 

now i really LL, my rpm meter light blown I think.. just now night riding cannot see the RPM lol

 

 

ya la,toking to u lolZ!! kick start lever all oso same wat,how come mine can kana u wont kana haha... if ur foot placed diagonally facing outwards when kick start near the end itZ actually quite close to the rear brake pedal... anyways my mech told me my rear brake not working.. so no choice... oso have to fix it haha

 

hahaha can see speed can roughly estimate ur rpm le wat lolZ!! so how? replace bulb ah haha

[LL]

ya la,toking to u lolZ!! kick start lever all oso same wat,how come mine can kana u wont kana haha... if ur foot placed diagonally facing outwards when kick start near the end itZ actually quite close to the rear brake pedal... anyways my mech told me my rear brake not working.. so no choice... oso have to fix it haha

 

hahaha can see speed can roughly estimate ur rpm le wat lolZ!! so how? replace bulb ah haha

 

ride with 1 brake ah

i got 1 fren told said he ride a bicycle with 1 brake...

then i ask why? he say like tat u will become faster cos when corner u cannot slow down just kup lol:faint:

that's how he got into so many accidents on a bicycle in a year.. major 1 kena lorry at filter lane..

 

hmmm i figuring how to open up the speedo.. u noe how?

[bigboystoys]

Yeah I rode with only rear brakes on my S4. And I guess most ppl know how notorious those rear brakes of S4 are. I'm practically standing on the rear pedal and the bike's not really stopping. So relied a lot on engine brakes and easing off the throttle. But I thought it's good training to learn about the rear brakes' limits.

 

 

Sin^Filled, I think your rear brakes are in worse condition than my front brakes. At least I could still push my bike after 15 mins of riding. Haha

Better go fix it fast. When your brakes are stuck, temperature's going to build up fast if you continue riding and you'll get your pads glazed and disc burnt. Pads are cheap but discs are not.

 

[Aalex82]

Well you don't have to use your brakes at all to have it heated up because your pads and disc are in constant contact. And not having a perfectly flat disc to the pads does add to the rubbing effect.

 

I speak from real life experience whereby I knew the my calipers are seizing up but haven't had the time to fix it yet. So I rode without using the front brakes at all. 15 mins of riding and I can start to feel the bike having a bit of 'braking' at the front.

 

 

 

ya..

i noe the rotor is constantly in contact wif the pad..

but i nv say that not using the brake will not cause the rotor to heat up..

for his case, even the rotor expand due to the heat generate even thou he not using the brake at all, if the o-ring and piston is in working condition, will not give the braking effect much as the pad/piston will be push back alittle.

 

i juz stating the main possible reason to it.. brake rotor sure will expand abit when heat up.

[SinFilled]

ride with 1 brake ah

i got 1 fren told said he ride a bicycle with 1 brake...

then i ask why? he say like tat u will become faster cos when corner u cannot slow down just kup lol:faint:

that's how he got into so many accidents on a bicycle in a year.. major 1 kena lorry at filter lane..

 

hmmm i figuring how to open up the speedo.. u noe how?

 

 

haha ur fren riding how fast,how come lorry oso can kana accident haha

 

speedo i din tamper with it b4,oso not sure,better ask the experts around here or go shop do lohZ,wont be ex oso wat haha

[SinFilled]

Yeah I rode with only rear brakes on my S4. And I guess most ppl know how notorious those rear brakes of S4 are. I'm practically standing on the rear pedal and the bike's not really stopping. So relied a lot on engine brakes and easing off the throttle. But I thought it's good training to learn about the rear brakes' limits.

 

 

Sin^Filled, I think your rear brakes are in worse condition than my front brakes. At least I could still push my bike after 15 mins of riding. Haha

Better go fix it fast. When your brakes are stuck, temperature's going to build up fast if you continue riding and you'll get your pads glazed and disc burnt. Pads are cheap but discs are not.

 

 

 

so all s4 rear brake like that one huh? i tt time tried riding my fren's s4 i tot onli his is like that haha heard expert riders onli use rear brake to ride lol

 

yeah dunno watZ wrong with my rear brake oso,rode to work without using rear brake reach carpark cannot push,push damn hard can hear screeching sound from the rear wheel haha btw $35 for brake pad considered ex? i scared kana chop again haha

[SinFilled]

ya..

i noe the rotor is constantly in contact wif the pad..

but i nv say that not using the brake will not cause the rotor to heat up..

for his case, even the rotor expand due to the heat generate even thou he not using the brake at all, if the o-ring and piston is in working condition, will not give the braking effect much as the pad/piston will be push back alittle.

 

i juz stating the main possible reason to it.. brake rotor sure will expand abit when heat up.

 

 

how does the rotor and piston look like? sorry but im new to riding haha any illustrations coZ i dunno how they work actually hehe sorry

[Aalex82]

how does the rotor and piston look like? sorry but im new to riding haha any illustrations coZ i dunno how they work actually hehe sorry

 

rotor is another name for brake disc..

brake piston is inside the brake caliper..

onli when u remove the brake pad then u can see it very clearly..

is like a metal cylinder container..

[SinFilled]

oh!!!! disc i know i know lolZ so rotor is another name for it huh,kk dictionary upgraded ^^ itZ time i learn go bike shop stay few months to pick up some mechanical skills haha

[BlackBandit]

Dude,

Had the same problem with my Blackbird a few months back. Piston seals are not that expensive. For Blackbird, bleeding plus changing of piston seals at HKL are $120, all inclusive and it's more complicated because of Combined Braking System. So, it'll be much cheaper for you.

 

Might I suggest that you get the brake cleaner and DIY yourself first? Unscrew your rear brakes assembly from the discs. Take out the brake pads & put something as a buffer (perhaps a thick screw driver) to stop the pistons from popping out when you pump the brakes. After pumping the brakes, the pistons will be exposed. Spray the brake cleaner & wipe with a soft cloth. After that, wipe clean & spray Lithium Grease (Available at hardware stores). Then, push the pistons back up, fit the brake pads and screw back the brake assembly. Then pump the rear brakes a few times until you feel the braking effect of the rear brakes & finally, you're done.

 

If all this fails, send to bike shop....

[SinFilled]

Wow... thanks blackbandit... this is wonderful information :thumb: so if i disassemble it... how to note if i've any spoilt things... like worn o-ring or piston stuck and stuffs like that hehe

[BlackBandit]

Wow... thanks blackbandit... this is wonderful information :thumb: so if i disassemble it... how to note if i've any spoilt things... like worn o-ring or piston stuck and stuffs like that hehe

 

Signs of worn/damaged O-Ring or piston seal is when you have difficulty pushing the pistons back in or out even after cleaning your pistons. Noticably, you can see residue of rubber from the seals when you managed to pump out the pistons...

[Aalex82]

the walls on the brake piston should be smooth..

if there is any ting holes in it like pimples..

oso means the brake piston is wear off..

[bigboystoys]

Wow... thanks blackbandit... this is wonderful information :thumb: so if i disassemble it... how to note if i've any spoilt things... like worn o-ring or piston stuck and stuffs like that hehe

 

 

If your pistons are seized, I doubt you'll be able to remove them. Unless you only have one piston if your rear caliper (ala floater calipers). But I really doubt you can do much. No harm trying though. If you managed to remove all the pistons (assuming 2 pistons for rear caliper), then you can clean them properly and re-installed. If you only managed to remove one and have absolutely no way of removing the other piston (unless there's compressed air), then just leave it as it is and ride to your workshop to have them fixed. At least you know when you ride with that condition, there's no way the rear brakes will get stuck. Haha.

 

When I serviced my own S4 front calipers, I have 4 pistons to remove. Even with compressed air, I have quite a bit of difficulty getting all 4 pistons out of the calipers. First time I tried to do it without compressed air, I remove only 1 piston out of 4. Once just 1 piston is out, you lose all the pressure in the system and you won't be able to push the pistons out. So I put the pistons back and with no brake fluid or pressure in my system, there's no more stuck brakes!!! hahaha

 

 

[SinFilled]

Hey guys... im back from Looi's motor... my brakes are in working condition now... $70 for both rear and front brake pad... $65 for rear brake pump kit + worksmanship... izit too ex?? somemore had an unpleasant experience there... haiZ...

[econbizer]

Hmm I kenna b4 too.. The immediate short term solution is to tap hard on ur rear brake for as many times as required.. until u can push ur bike comfortably forward in neutral.

[SinFilled]

haha u mean u kick start oso will accidentally hit ur rear brake? haha I now scared to kick start,will aim properly like play golf like that haha

 

I've fixed my rear brake oreadi,but still some unsolved issues with Looi's motor... dun wanna blow it up... haha