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1Back to top Go down   front brake pad wear uneven Empty front brake pad wear uneven on Tue Nov 13, 2018 11:07 am

audibob

audibob
Life time member
Life time member
Hi All.

my front pads are wearing slightly unevenly on both calipers.

Both sets are chamfered  towards the rear of the caliper .

ie, the first part of the pad to come into contact with the disc in normal forward wheel rotation

All four pistons move and retract freely.

All the pads are wearing evenly across the pad surface and braking is good.

Is this the result of using floating discs ?

Bob





front brake pad wear uneven 20181112
front brake pad wear uneven 20181113


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

2Back to top Go down   front brake pad wear uneven Empty Re: front brake pad wear uneven on Tue Nov 13, 2018 11:53 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
It's difficult to see if there's described uneven wear from the piccies you've posted, but you state that they are wearing evenly across the pad surface. Some manufacturers chamfer their pads from new. 

For peace of mind the first thing I'd do is to remove the pad retaining pins and clip from both sides and 'shine' them a bit, also deburring the holes in the pads so that the pads can move freely through their intended range of travel as the pistons press against them and retract. There was a bloke several years ago in the UK selling stainless steel pins for Brembos and I bought a set and used them successfully. There also might be a slight hang up in one or more of the pistons in use over the road that isn't readily noticeable in situ. A good bleed and refill might eliminate debris caught behind the pistons. It's a hard life inside.

I have personally never experienced uneven wear on pads that could be attributed to floating discs.


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei  - Beemers owned still or sold.

    

3Back to top Go down   front brake pad wear uneven Empty Re: front brake pad wear uneven on Tue Nov 13, 2018 11:57 am

duck

duck
Life time member
Life time member
I see that all the time. I don't worry about it.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
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4Back to top Go down   front brake pad wear uneven Empty Re: front brake pad wear uneven on Tue Nov 13, 2018 12:20 pm

92KK 84WW Olaf

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Sticky pins meaning the pads don't quite hand and move freely on them as they should but they won't ever move so freely the wear is totally even unless you only ride in some nice 20c plus location and never ever get them wet.

For the rest of us road crap, moisture, rust and build up are the order of the day .....all you can do is clean them up regularly but you won't prevent it happening. I pull the brake pads out regularly and check them and keep spare sets of cleaned up pins so I can swap them quickly.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 105,200 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell Now 36,188  miles
    

5Back to top Go down   front brake pad wear uneven Empty front brake pad wear uneven on Tue Nov 13, 2018 12:45 pm

audibob

audibob
Life time member
Life time member
All my guides are stainless, and the whole system was completely overhauled a couple of years ago.

Just a bit odd that the wear is the same for both sides..

I regularly change the fluid and clean the pads, especially during the winter.

Pad free movement is checked on the pins and against the caliper body.

Seen this on cars when the carrier is stuck on one side.

I will monitor pad wear the next time  I change them .

bob


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

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