Rear brake problem, pointy.

[hindle8907]

How do i ajust the rear break ?

it goes quite far down before it starts to break and doesnt feel as responsive as it did a few weeks ago when i got the bike.

also what i have noticed is that i use my front more than my rear but after a ride and im locking the bike up the back disk is red hot and the front is just warm.

any reason for this ... or am i just riding the rear without knowing.

thanks ant ,

[Dave20046]

Do you have a haynes manual? (or alike)



In regards to the hot rear disk, possibility that the caliper needs servicing as it might be dragging. If I'm not hammering it, when I park up both my disks will be pretty cool.

[SoulKiss]

Do you have a haynes manual? (or alike)



In regards to the hot rear disk, possibility that the caliper needs servicing as it might be dragging. If I'm not hammering it, when I park up both my disks will be pretty cool.

When you are looking it up in the index of the manual you will find the information under Brakes (Rear) tho...

[Dave20046]

That's worth noting.

[hindle8907]

ill have another look in the manual .
i dont have a haynes manual so might invest in one.

but yeah the back disk is realy hot as in you can only touch it for a second or it will burn .
whers the front is warm or cool .

[hindle8907]

When you are looking it up in the index of the manual you will find the information under Brakes (Rear) tho...

i only have the normal manual .

[SoulKiss]

i only have the normal manual .

To be honest it will be under that in any manual...

[timwilky]

Firstly I very rarely use my rear brake the front can get nice and hot, but never the rear.


It sounds as if your brakes are dragging, are you riding with your foot on the lever?

check the pistons/pads are retracting properly when you release the lever

[Dave20046]

Search the forum for servicing rear brakes, Sounds like that's what you'll need to do. You need to take off the rear caliper and check piston movement etc.

The rear brake adjustment is done by turning a nut on a threaded section at the pivot end of the lever after first undoing the locking nut (or it is on most bikes anyway)

[hindle8907]

im going to drive home tonight without using the rear and im going to keep my foot off the lever.

and ill check the disk when i get home to see if its hot still .

and ill check the pistons/pads

[hindle8907]

Firstly I very rarely use my rear brake the front can get nice and hot, but never the rear.


It sounds as if your brakes are dragging, are you riding with your foot on the lever?

check the pistons/pads are retracting properly when you release the lever

just went and had a look on my dinner and the pads was on the disk i moved it over with a knife and applied the brake and let go and it didnt move back over.

[timwilky]

obviously they don't fully retract, but there should be a noticeable easing off when you release the brake pedal.

Best way lift the back end, can you easily spin the wheel. You don't even need a paddock stand, get a friend to lean over the bike from the left hand side, pulling it up on the side stand. the stand takes the weight, your friend is simply balancing it on the stand.

[hindle8907]

it doenst move at all once released. what shall i do.

[flymo]

it doenst move at all once released. what shall i do.

The caliper half moves on a slider that should be greased, its probably dried up and full of what now looks like white powder where the alluminium caliper has oxidised.

Pretty easy to service, you dont need to break open the brake lines or anything. Just remove the rearmost caliper bolt and rotate the whole thing forward, it should then slide off to the right away from the wheel.

[hindle8907]

im not sure im confident to remove it.

anyone in manchester area fancy giving me a hand .

[flymo]

im not sure im confident to remove it.

anyone in manchester area fancy giving me a hand .

I'm about an hour away if you fancy a ride over. Happy to remove and sort it for you if you dont find anybody closer.

its pretty easy to do though, could always talk you through it.

[hindle8907]

thanks but thats a little far lol ....
what tools will i need

[flymo]

thanks but thats a little far lol ....
what tools will i need

A spanner or socket set (only one bolt to undo), think its 12mm. some small pliers to remove the pad retaining pin, some grease and a few rags. Thats about it really.

[hindle8907]

ill give you a shout when i get home mate . ill go see if some one can borrow me a socket set.

[hindle8907]

got 12m mate jsut tryed it and it fits so .... what do i do once iv taken it off .

[flymo]

If necessary I'll grab a few pics when i get home if that helps.

Okay, you remove that rear bolt totally.

The caliper should then rotate towards the front of the bike, keep your hand on the pads as they may slip downwards. The caliper should then slide off to the right, it rotates around a big slider pin, you cant miss it.

Just move the loose part of the caliper out of the way for now but leave the brake hose connected. The hole that the slider pin came out of has a rubber boot over it i think, remove that and clean out the hole. It will either be full of old grease or maybe white powdery cr&p.

With the hole nice and clean, regrease it and refit the rubber boot and turn to the caliper itself.

There is a pad retaining pin, its held in by a small clip, remove the clip and remove the retaining pin. These pins can sometimes seize so be patient. remove the pads and give everything a good clean with the rags. You could also give the pads themselves a good clean in hot soapy water, rinsing them with clean water following by a dry off with a clean rag.

Then refit everything. The caliper should be free to slide back and forth gently.

As the brakes may have been dragging you might find that the disc or pads (or at least one of them) is worn. If so they may need replacing if you are unlucky.

[hindle8907]

i did all that you told me bar removing the brake pads becuase i couldnt get the pin out that was holding them in ? how does this remove ?.

but i still think their draging. going to have a look tongiht when a friend gives me a hand geting the back wheel of the ground.

[flymo]

i did all that you told me bar removing the brake pads becuase i couldnt get the pin out that was holding them in ? how does this remove ?.

but i still think their draging. going to have a look tongiht when a friend gives me a hand geting the back wheel of the ground.

Ah, slight misinformation on my part, the rear pad pin doesnt have a small retaining pin like the front. On the right of the caliper there is a small protective cover that should unscrew (see part 8 in the image below).

Then the pin (part 7) can be removed with an allen key (M6 I think).

4746

It may be that the brake piston itself is dirty and binding with the fluid and dust seals. Replacing those is a little more involved as you'll need to bleed the rear brake afterwards etc. Again though, if you want a hand I'm in Wallasey.

[hindle8907]

cheers mate . ill have a look again tonight. thanx

[flymo]

cheers mate . ill have a look again tonight. thanx

Did you get yourself sorted with this?

[hindle8907]

hi mate i took it over to YC and he gave it a service. and said all looks ok .(which was verry kind of him cheers)
but my disk still seems to be getting red hot.