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One Less Harley 10-10-2010 04:42 PM

So you want better brake on your R100GS, why not a 4-pot Brembo????
Sold Out

1st group before machining

Nice factory looking fit.

Brembo conversion for BMW R100GS-To convert the two pot caliper to a four pot Brembo caliper.
No modifications needed can use existing brake lines. I suggest Galfer Green Pads (FD198G1651) (FD 198G 1532 a braided brake line for best results.. Or pads of your choice which match up with K1100XX, R1100XX, R110GS or R1200C.

Caliper Only Price $190.00 ( $12 S&H )
Sales only to the USA
In purchasing buyer and/or user agrees to "fine print" below.

Personal check or money order OK Or Pay Pal add $9.00, to avoid PayPal fees pay as a gift or now I think it's choose send money to friend or family option. Contact me for how to send payment.

please read the fine print any questions about this or the calipers please ask.

The "Fine Print"

Please note-In purchasing caliper buyer and/or user agrees to the following- The caliper is a used modified part and it is the purchasers sole responsibility to check function of part and assumes all risk in it's use. Seller is not responsible for any for property damage monetary and/or other wise and/or bodily injury damage caused by brake caliper.

Brake Line Notes-

The stock length line is 31.5" (800mm) for 1989-1990), 25.75" (655mm) for 1987-1990.. I've purchased stainless steel brakes line from Rennsport Auto off Ebay for a decent price especially if you compare prices to Speigler or Goodridge Lines, but Motobins has a good price too.

Note it is best to terminate the flexible line at the steel brake line to the caliper as it keeps the flexible line behind the fork out of the way of getting snagged on something.

Master cylinder Notes-

There are two different master cylinders, the early style (1987-90) like on the R80 G/S in which the line threads directly into the MC and the later (1991-95) which has a banjo bolt which threads in.
Early MC bores- 1980-90 12mm, 13mm, 14mm, 15mm, 16mm (Motobins list all 5 bores), 12mm R80 G/S, 13mm R100GS
Late MC bores- 1991-95- 13mm

Brake Rotor Notes-

Over the years I've had problems with brake pads squealing, due to glazing of the rotor. A brake rotor hone will knock the glazing off and leaves the rotor a little roughed up. This is better than using sand paper.

A less expensive alternate to the stock BMW rotor is the EBC rotor. Ted Porter has had these at a competitive price.

fishkens 10-15-2010 11:16 PM


Does the 31.25" stainless line extend all the way from the master cylinder to the caliper (I'm 99% certain that it does but want to confirm)?

If so, just curious why you didn't run the stainless line from the master cylinder to the solid brake line that goes from the fork brace to the caliper. Maybe it's because not all models had that brake line running from the fork brace to the caliper like my 88 GS? Or some other reason?

I've searched for photos but haven't had any luck.

Also, it looks like you once used the 320 rotor. Do you still use that or are you now using the Brembo 4 pot with the stock rotor.

Again, just curious about your learnings over time.


One Less Harley 01-06-2012 05:38 PM

They're here...and 3 days later they're gone

darklight79 01-09-2012 08:43 AM

so sold out huh ? so whats up new parts refurbed or used ? from a 1150 right ? then looks like the sides ground down ... bout 5/16 so when ya gonna have more ? stu

One Less Harley 01-09-2012 10:03 AM

I buy them used, there's no way I could buy them new or replace seals at that price. Most of the time used calipers aren't cheap, so it takes some looking to purchase them at a reasonable price. Left calipers from R/K 1100's or R12C's. R1150's used a Tokico caliper and I think mount spacing is different.

It's just milling off some material, search and you'll find my post or others on the subject.

If you send me a left caliper I can have yours done for $65.00 plus s&h. For simplicity's sake USA only.

darklight79 01-10-2012 07:14 AM

thanks for the info ... knew i should have jumped on this when I saw em ...Pre ordering the next one now thanks

One Less Harley 05-31-2012 08:47 AM

here's a shot of the two latest calipers. These things are getting harder to come by lately.

Sold out already...sorry

luxlogs 12-09-2012 01:35 PM

Bump cause I want one
Mr. Harley

Would you be so kind as to put my name on the 4 pot Brembo list for my 92 R100GS.

Thank You in Advance and since there calling for snow tonight their is no hurry.


One Less Harley 12-09-2012 02:13 PM

Well I've just found another, probably not have it done till after Christmas though.

luxlogs 12-10-2012 12:55 PM

Like I said no hurry, just glad to be on the list. Let me know when and where you would like payment



One Less Harley 01-10-2013 06:31 PM

It's been a while since I've been able to find some of these. I buy them when ever I can but finding them at a decent price has been difficult, but I've acquired four more Brembos, two have been sold and only two left. See 1st post for price.

luxlogs 01-11-2013 06:03 AM

Got mine yesterday, can't wait too double my breaking power. Cheap at twice the price. THANKS:clap

One Less Harley 01-11-2013 04:36 PM

I hope they meet up to your expectations, don't forget the stainless brake line helps too.

Here's the last two.

luxlogs 01-12-2013 08:00 PM

Just got my 4 pot Bremo from OLH, now I need to service it before install.

BMW Part #'s

Brembo Left Caliper 34 11 2 333 111

Pads 34 11 7 663 764

Repair Kit 34 11 2 331 631

I Think, someone double check me before I place my order with Countryside BMW.


One Less Harley 01-12-2013 08:27 PM

You've listed the correct p/n for the pads and rebuild kit. The caliper p/n may not be right as there are some small differences with the pistons (same rebuild kit though),some have solid pistons and some are hollow (less heat transfer???? like yours Luxlogs), and some have a locating tab next to the brake line. If rebuilding, DO NOT PRY OUT THE PISTONS, as they are some sort of brittle ceramic and will crack, but the kit comes with new pistons. DO NOT SPLIT THE CALIPER AS YOU WILL NOT GET IT TO SEAL..BTDT!!!

Are you going to rebuild it???? It should be fine, but I did purchase it used, so if you want to. Of all the ones I've done none have leaked. I wouldn't buy the BMW pads, they are very expensive!!! Get the Galfer Green pads, which I like, but there are others like EBC. Look for pads fitting K or R 1100's, R1200C.

Something you might do before installing new pads is to use a brake rotor hone. This will knock off the glazing and is the best thing to do to keep brakes from squealing, which sometimes happens with new pads. It works better than sand paper.

I DON'T THINK YOU WILL DOUBLE YOUR BRAKING POWER, but it will be a noticeable improvement!

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