Brake pad and rotor replacement article - BMW F800 Riders Forum & Registry



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  1. #1
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    Here is a brake pad and rotor replacement informational article. This one written by Galfer, so it might be a little slanted, but I assume that they know what they are talking about. However, the last half of the article talks about brake discs, how to clean them and how to break-in new pads, which I found interesting. (They recommend not using brake parts cleaner to clean brake discs, as an example.) I also posted this in the Hall of Wisdom section: http://www.bikebandit.com/blog/post/...-by-galfer-usa
    Richard - Current bikes: 2016 BMW R1200RS, 2014 14.2 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2005 Triumph T-100 Bonneville, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

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  3. #2
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    Thanks, a good resource. But I'm surprised they don't address the myth of "warped" rotors causing brake pulsing, especially considering that full knowledge of this leads to more rotor/pad sales.

    Very few brake rotors actually warp in service. Much more likely is that for various reasons, the most common being excessive heat, pad material gets permanently deposited on portions of the disc surface so as it rotates the pads grab and let go over and over. Sometimes the rotor can be machined, but many bikes -- our F800s for sure -- have such small wear limits on the discs that it's time for a new part (and pads, obviously).

    And yes, I know about the problem with certain model year ST's rotor bobbins allowing the disc to cock and simulate warpage. But that is a minor exception.

    -dan
    Blue '09 F800 ST: ABS, toasty grips, trip computer, center stand, sport panniers, Ventura luggage, Valentine 1, Garmin zümo 660 RAM mounted, Sena 20S & SR10, P3 LED tail lights, Grip Pups, Centech AP-1 fuse panel, Go Cruise control, Shoei GT-Air, Gerbing's jacket liner, MRA X-creen Sport. 

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    I think the most common cause of warped rotors is rough handling while mounting tires. Use special care transporting wheel off-bike to get new tires mounted.
    2016 Yamaha FJR1300A; 2016 Beta 430RS; 2007 BMW F800S; 2009 Husaberg FE450; 2016 Subaru Outback; 2013 Tesla Model S 85; 1983 Porsche 928S; 7 cats 

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  8. #4
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    Quote Originally Posted by N4HHE View Post
    I think the most common cause of warped rotors is rough handling while mounting tires. Use special care transporting wheel off-bike to get new tires mounted.
    The S and ST conveniently dish the rear wheel so it can serve as a safe carrier for the front in my trunk.

    Does the "rough handling" include some of the butchery I've seen and heard of while actually mounting/dismounting the tire on a machine?

    -dan
    Blue '09 F800 ST: ABS, toasty grips, trip computer, center stand, sport panniers, Ventura luggage, Valentine 1, Garmin zümo 660 RAM mounted, Sena 20S & SR10, P3 LED tail lights, Grip Pups, Centech AP-1 fuse panel, Go Cruise control, Shoei GT-Air, Gerbing's jacket liner, MRA X-creen Sport. 

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    Out of curiosity...how long do your brake pads last on the F800?

    Chris
    Elnathan - 2014 BMW F800GT
    IBA# 49894 True Rounder = 0-20's - Rounder -- to -- 100's+ Red Hot Rounder

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  10. #6
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    Quote Originally Posted by Daboo View Post
    Out of curiosity...how long do your brake pads last on the F800?

    Chris
    On my F650GS, the front brake pads last longer than the disc (which doesn't warp, but does develop an uneven friction surface within about 10K miles).
    Richard - Current bikes: 2016 BMW R1200RS, 2014 14.2 kWh Zero S, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2005 Triumph T-100 Bonneville, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior. 

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    Quote Originally Posted by Daboo View Post
    Out of curiosity...how long do your brake pads last on the F800?

    Chris
    I've got 40k on my fronts and they have a fair amount of life left. I bet the discs won't pass the wear limit test when it's time for new pads.

    I cooked the rears by accidentally dragging the brake, but I bet they would go 50-60k absent that bonehead manuever.

    -dan
    Blue '09 F800 ST: ABS, toasty grips, trip computer, center stand, sport panniers, Ventura luggage, Valentine 1, Garmin zümo 660 RAM mounted, Sena 20S & SR10, P3 LED tail lights, Grip Pups, Centech AP-1 fuse panel, Go Cruise control, Shoei GT-Air, Gerbing's jacket liner, MRA X-creen Sport. 

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    Quote Originally Posted by danham View Post
    The S and ST conveniently dish the rear wheel so it can serve as a safe carrier for the front in my trunk.

    Does the "rough handling" include some of the butchery I've seen and heard of while actually mounting/dismounting the tire on a machine?

    -dan
    Yes. And out of owner's sight so shop denies responsibility.

    Decided its probably not economically justifiable but bought my own No-Mar mounting stand and balancer last year. Mounted 8 tires so far.

    Click image for larger version. 

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    2016 Yamaha FJR1300A; 2016 Beta 430RS; 2007 BMW F800S; 2009 Husaberg FE450; 2016 Subaru Outback; 2013 Tesla Model S 85; 1983 Porsche 928S; 7 cats 

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  14. #9
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    I had the GT in for new tires yesterday. They said I have 30% left on the rear pads. The fronts looked like they have plenty of life yet. I bought new rear pads. The dealership sold me HH EBC pads to keep on hand. The parts guy said they would give me more bite. Not sure if I need more bite on the rear pads. I've engaged the ABS on the rear several times without trying.

    Looks like changing the rear pads is about a 30 minute job, to include washing the hands and putting away the tools when done. It's about as simple as it can be. One of the things that impresses me about this GT is how well designed everything is to work on.

    Chris
    Elnathan - 2014 BMW F800GT
    IBA# 49894 True Rounder = 0-20's - Rounder -- to -- 100's+ Red Hot Rounder

    John 14:6 

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