The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: erod1 on August 20, 2013, 09:08:08 PM
-
I removed the front brembo calipers on my 86 r65 mono single disk. Well I damaged one of the pistons while trying to remove it. My BMW dealer states I have to buy the whole caliper. I know you can find it else where. The problem is that I do not know what brembo type I have. I have seen f08 mentioned. But the site said it was a 38 mm piston. But mine measures at 48 mm. So is it an f08 or a f09 ?
-
F09 and they are used on Guzzi's and other Italian bikes so sourcing spares shouldn't be a problem.
-
Scroll down the page to Part # BRA54723
http://www.motorworks.co.uk/vlive/Shop/Parts.php?T=5&NU=15&M=20&Ct=HA&SbCt=BA_15_20_HA_25
I cannot find them on Motobins.
Where abouts are you?
Lou
-
While you are at it get a new piston seal too.
-
Thanks for all the input. Now I know that my 86 r65 mono uses f09 brembo calipers. So I purchased the f09 rebuild kit and cleaned everything and installed the new seals. The brakes still take longer to stop. I'll give hem a few more miles.
I wonder if I can replace an f09 caliper with a f08 caliper. Since the replacement from the dealer is almost $500. I found new ones at my cycle.com. They specialize in Moto Guzzi. But you can buy a new f08 caliper with brakes for $150.
-
Look the pads over, if they have a glossy look to the surface that contacts the rotor, run them over some fine sandpaper to get rid of the glaze .
If you have the OEM rubber brake lines, replace them .
I've replaced all of my brake lines on the bikes with braided stainless lines, they are around the same cost of rubber lines .
At least here in a desert environment, I won't use rubber replacements lines .
-
Should your brake disc have the typical wear ridges, you might need several miles and multiple braking reps to "wear in" the new pads. Best not to execute multiple hard stops in an attempt to break-in the pads; you'll only glaze them and reduce braking capability.
If you've already been heavy on the brakes, it might be necessary to remove and de-glaze the new pads. Also, any air remaining in the lines can reduce braking performance.
-
Best not to execute multiple hard stops in an attempt to break-in the pads; you'll only glaze them and reduce braking capability.
just when I thought I knew what I was doing...
Also, Ed, there has been talk (not sure if it was ATE, Brembo, or both) that that piston seals on the calipers are slightly tapered and should be installed a particular way to facilitate piston retraction. Digging through the technical forum should reveal something.
I know not the best time to mention such info ::) I didn't pay attention when I rebuilt my calipers and they seem alright though.
-
montmil wrote on Today at 06:19:48:
Best not to execute multiple hard stops in an attempt to break-in the pads; you'll only glaze them and reduce braking capability.
just when I thought I knew what I was doing...
The procedure is different for new / smooth rotors and used rotors. The instructions I received with my new spiegler rotor was to use new pads, and do several consecutive stops from 30 mph, allowing time for the rotor to cool. (I'm paraphrasing, that job's paperwork has been filed, one way or another.)