K75 Brake Rotors - is it possible to turn 'em?

[TaosBrick]

Here's what I got:



Sure, they work fine, still have lotsa pad. But I live in dusty, gritty environment, and I know they ain't gonna get any better. Feedback, y'all?

[johnny]

feedback...

ride it till it wont move... or at least till it wont stop...

the time to worry about brakes is when you need them and dont have them...

fear only the elusive chupacabra...

j o

[wmax351]

Johnny is right. There isn't much to turn, anyhow. If they have a problem, deal with it then.

[frankenduck]

I ran some by a brake shop one day and they said not enough meat there to turn 'em.

Ride it 'til it won't move. Or just keeps moving when you want it to stop.  :imwithstupid:

Pave your driveway... :neener:

[Chaos]

Mine look like that too.  The pads bed into the groves, as long as they're not warped you're good.

[TaosBrick]

Yeah, zey are waffer theen alright. Kinda figgered there wasn't enuf there to do anything with but hey, never hurts to ask. So far no probs, Thanks all.

[Rick G]

After the pads bed in to the disc you will have more surface area so the brakes must be better :lol:

[Chaos]

Haynes has the service limit at .14inch.  Mine are right there.  Uh-oh :loco:

[DRxBMW]

Haynes has the service limit at .14inch.  Mine are right there.  Uh-oh :loco:

You can run them below spec. NOT recommended but doable, as long as the rotor is NOT cracked or showing "warning signs" of fatigue. Tip, if you choose a softer pad the rotors will last a very long time compared to a sintered model.

With a thin disc, danger that the pistons can get hung up is my understanding. 

EBC has a GREAT replacement rotor worked up for the K 75.

http://tinyurl.com/motobrickrotors

I installed a pair on Pete's 1992 K 75 S, far superior to the OEM disc. 



EBC ProLite XC contour rotors are the toughest and yet the lightest sport and race brake rotors you can put on your bikes for many reasons and here is why these are best.

1) Contoured profile reduces weight by 7.5% without reducing actual “cooling mass” of disc.
2) New German mill rolled heat treated stainless steel rotor blade.
3) Vertical scraper slot system removes dirt, dust and debris quickly from braking area.
4) Unique fully overlapping vent hole pattern reduces weight, cleans disc blade and helps deglaze pads.
5) New Patented Stainless Steel SD (square drive) button drive system, prevent warping and vibration totally system – click here for full tech info.
6) Ultra lightweight ductile alloy centre hub.
7)Use of SD system allows less drive buttons, in the case of EBC we are down to six buttons
8) Full stainless components, no rusty parts and that’s guaranteed.

[TaosBrick]

Well, checked out the "Perfect Brakes" online retail site, and what they had was this:

http://www.perfectbrakes.com/products.asp?cat=1007

Doesn't look like the ones the DR posted above, and the price - YEEEOWCH!!

Where'd ya get yers Doctor, and how far did ya have to bend over for 'em?

[DRxBMW]

Well, checked out the "Perfect Brakes" online retail site, and what they had was this:

http://www.perfectbrakes.com/products.asp?cat=1007

Doesn't look like the ones the DR posted above, and the price - YEEEOWCH!!

Where'd ya get yers Doctor, and how far did ya have to bend over for 'em?

Ordered direct from the EBC UK factory,$380 for the pair,shipped.

Price the OEM BMW discs for a cardiac arrest,especially if you have ABS counting rings. $545.00 EACH

http://www.realoem.com/bmw/showparts.do?model=0572&mospid=51745&btnr=34_0655&hg=34&fg=11

[TaosBrick]

Yeah, I used to snigger at my friends who own land rovers or range rovers about how they had to present their posterior when approaching the parts counter. Guess th' buggering's on me now that I've entered the Beemer world  :embarass:

[wmax351]

I've got an extra set of front rotors from a non-abs K75. I'll measure them tonight, but they are still quite thick. I have them posted in the yard sale ("Misc K-bike Bits: http://www.motobrick.com/index.php/topic,1635.0.html)