Need some rear brake help... - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 13 Old 06-15-2005, 10:11 PM
Fish
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Need some rear brake help...

Hi gang.

I have a 2003 DL1000 and I noticed the other day when I had it up on the center stand that the rear brake caliper is applying a slight but constant pressure to the disk. When I spin the wheel it will only turn a half turn before stopping. I took the bike for a quick ride and then stopped and felt the disk and found that it was hot.
Does anyone know what is causing this?
Is it something that I can adjust, or is it a big bill at the shop?

Appreciate any help. Thanks!

- Chad
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post #2 of 13 Old 06-16-2005, 02:20 AM
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Sounds like the brake caliper needs a strip and clean - if you're not able to do it yourself it shouldn't cost too much at the shop.

DL650 K5, Staintune pipe, topbox, Powerbronze bellypan, Givi E21's, Suzuki handguards
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post #3 of 13 Old 06-16-2005, 02:05 PM
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All calipers/brake pads will make contact with the rotor regardless of whether the brake is applied or not, bike, car, truck whatever. So this constant contact results in some heat. Also rotating the rear tire may not spin very far due to the drag of the chain also preventing the tire from free wheeling.

So some of this is normal but if it seems to be excessive heat or friction, pulling the caliper retaining bolts and cleaning the rubber seals around the caliper, these have folds that can retain dirt and prevent complete retraction.

Applying a small amount of grease to the pins that loctate the pads can prevent a dragging pad. The grease goes ONLY on the pins, not the rotor, the caliper or the pads. It is not uncommon for a pad to bind slightly on its pins and become cocked resulting in a dragging pad. Some people will even slightly bevel the edges of the pads pin holes to further prevent this possibility.

Hope this helps.
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post #4 of 13 Old 06-16-2005, 02:12 PM
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I read somewhere, maybe this site, that the pads will float at speed and not make contact. The holes in rotor reportedly keep the pads from floating when the brakes are applied.

How hot is the rotor getting?

650...Anything more than a handfull is wasted
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post #5 of 13 Old 06-16-2005, 06:49 PM
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Thanks all. It is great to be a member of a site like this 8) . The rotor does not get burning hot - but any amount of heat felt hot when I thought that the pad wasn't supposed to touch the rotor. I will keep in mind what you said next time I ride the bike and decide if it is over what would be "normal" levels.
Cheers,

- Chad
post #6 of 13 Old 06-16-2005, 07:05 PM
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The holes in a rotor, are for appearance, cooling, and allow an escape route for items cleaned &/or wiped along with relief of out gassing by very hot or very cheap pads.

As to allowing the pads to stop "floating" when the brakes are applied, this doesn't make any sense to me. It would seem to imply there is some secret force that prevents the pads from making contact unless it has a hole to escape to that is stronger than the hydralic force exterted by the master cylinder.

As to the pads floating or retracting at speed to not make contact again doesn't make sense to me, this would imply then your brakes would have a different feel and more importantly more lever travel the faster you go. IME the brakes lever travel and feel remain the same regardless of 10mph or 100mph.

Properly set up floating calipers will make contact between the pads and the rotors which will generate heat, try riding your bike for some period of time and then stop using only one set of the brakes, then touch the other rotor (the one you didn't use) and feel the heat generated just by the rotation of the rotor through the pads.
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post #7 of 13 Old 06-17-2005, 11:25 AM
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I went for a quick ride and I think that the heat generated is probably due to the normal contact between the caliper and rotor. Thank you all for straightening this out for me.

- Chad
post #8 of 13 Old 06-18-2005, 02:51 PM
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Quote:
Originally Posted by MATTMAN
I read somewhere, maybe this site, that the pads will float at speed and not make contact. The holes in rotor reportedly keep the pads from floating when the brakes are applied.
This is the strangest statement I have ever heard! :shock:
post #9 of 13 Old 06-18-2005, 09:45 PM
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I have done reading up this as it seemed bit odd to me as well.

The thing about the pads moving away as the bike is moving seems to have no merit.

It turns out the holes in the rotors can keep the pads from floating, but only if the pads out-gas. This appears to be a heavily debated topic on the car racing forums. It seems in the old days pads gassed a bit more than they do today.

650...Anything more than a handfull is wasted
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post #10 of 13 Old 06-18-2005, 09:48 PM
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I'm even more confused than I was before!! Out gassed?! :?:
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