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Old March 27th, 2017   #61
PaulRB
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Default Re: Brakes dragging - Possibles causes?

2008 Set-Up Instructions.
Use the Sequence and Torque spec for all year model ST 1300's.

Front axle spacers size and location is also within.



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Old March 28th, 2017   #62
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Default Re: Brakes dragging - Possibles causes?

Thanks, Paul.
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Old April 15th, 2017   #63
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Default Re: Brakes dragging - Possibles causes?

Seems a recurrent problem for me. Now, the rear brake gets hot. I did my spring test ride to verify that everything is OK but it was not. As mentioned the rear disc gets hot. I did a test riding the bike for several kms without touching the brakes. At the end of this short ride I was uphill so I let the bike stops by itself without touching the brakes. Rear disc hot, front discs stone cold...

I did remove the rear caliper, cleaned everything; the pistons (without removing them from the caliper) but I did a good job on this, put silicon grease on the the pins, reassemble everything. All seems fine. Went for a short ride; it didn't make a difference and it seems worse as when I got back home, the rear wheel was hard to rotate with the bike on its the center stand.

Looked at the front for the SMC to be the source of the problem, there is the usual free play. Doesn't seem to be problematic.

One thing that bugs me though, is that the rear caliper pistons seems to protrude a lot even if I have plenty of pad material left. Is it normal?

Any clue where to start from?

Thanks.
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Old April 16th, 2017   #64
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Default Re: Brakes dragging - Possibles causes?

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Looked at the front for the SMC , there is the usual free play.
What free play?, There shouldn't be any. Have you had a look under the rubber boot on the SMC to see if it is stuck in a bit...

Your caliper looks fine, and clean too, The by product of the brake binding is pad wear and drag.
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Old April 16th, 2017   #65
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Default Re: Brakes dragging - Possibles causes?

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What free play?, There shouldn't be any. Have you had a look under the rubber boot on the SMC to see if it is stuck in a bit...

This is my next step

Your caliper looks fine, and clean too, The by product of the brake binding is pad wear and drag.
You mean warped brake disc?
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Old April 16th, 2017   #66
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Default Re: Brakes dragging - Possibles causes?

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What free play?
The SMC on its support rotates freely back and forth.
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Old April 16th, 2017   #67
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Default Re: Brakes dragging - Possibles causes?

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The SMC on its support rotates freely back and forth.
It shouldn't have play. It sounds like it's piston is jammed in.
Press the rear brake pedal, that should push the piston in the SMC back out and in turn will remove the free play.
Let us know what happens.
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Old April 16th, 2017   #68
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Default Re: Brakes dragging - Possibles causes?

Quote:
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It shouldn't have play. It sounds like it's piston is jammed in.
Press the rear brake pedal, that should push the piston in the SMC back out and in turn will remove the free play.
Let us know what happens.
Went outside with my wife.

No pressure on the rear brake pedal;
SMC have its normal play back and forth, let's say I can push-pull approx 1 mm back and forth.

With pressure on the rear brake pedal;
No more play
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Old April 18th, 2017   #69
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Default Re: Brakes dragging - Possibles causes?

a while back when I was getting a new tire installed the dealer also installed rear brake pads. When I picked up the bike it seemed like there was a little more resistance when just spinning the rear tire while on the center stand. After a week of riding around there was still resistance. I knew something was wrong so I removed the brake pads and noticed they put on a set of front brake pads on the rear. Going off memory.... the rear pads have a grove in them and the fronts do not. After putting in a new set of rear pads with the groove. I had no more resistance.
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Old April 18th, 2017   #70
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Default Re: Brakes dragging - Possibles causes?

Several things can cause this, but be sure to check the brake lever, too. If it doesn't return properly, it can block the return lines, leaving the pads under a bit of pressure.

Just a thought.
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