Brembo

Get the Brembo RCS 19 Master Cylinder and you won't be disappointed one bit!!

 

Do NOT buy RCS 19, if you don't trail brake.
Stock is great! Many racer's went back to stock after they fitted RCS...

 

I swapped out my stock master and replaced it with an RCS19 Brembo and could not be happier. Difference is like night and day. Way better braking now. Just my opinion but from what most people I've talked with they all concur. Dan Kyle can beat most prices as well. Also, these come with the double banjo bolt, you need a single, but also the stock OEM banjo bolt on your bike will work fine. Same thread and length. I ordered the extra brake reservoir but did not use it. I used the stock one, and ordered brake line hose clamps, the one time use ones, same as rear early K100 for fitment, and clamped the stock hose on. Works great, no leaks, stops better than before, and I'm happy. Hope this helps, Alyson

 

IF you're still around...

So you were able to use the stock hose and reservoir? I had thought the hose diameters were different? Perhaps just a good clamp was enough to prevent any leaking.

 

So it sounds like the only model that anyone has fitted is the RCS19?

 

So the difference between and "RCS" and a non "RCS" Brembo lever is that the RCS is adjustable?

 

Hi, the RCS19 has two settings for lever pressure and is adjustable. I believe there are other RCS models made by Brembo that are adjustable, but the 19 seems to be the most popular. I like it as it has a folding lever, there are low drag levers that come as accessories, and they make a clutch lever that matches so both sides feel/look the same. Low drag levers both sides as well. Look good, feel good, work good. Vast improvement over the stock. I used the OEM BMW reservoir by simply buying a one time clamp (early K100 rear brake version) and using the BMW tool to clamp it tight, no leaks. Also, these come with a double banjo fitting, we need a single but the OEM BMW banjo bolt fits perfectly. Don't forget to change out the brake fluid as well. I use Motul 660 racing brake fluid. Someone out there might suggest something different/better but I think the important thing is to change it out every year and as long as it's a better quality brake fluid, you can't really go wrong.

 

I'll probably end up doing the RCS19 on my HP4 as well. Loved how they feel on my 1198SP track bike. Definitely a must do if you plan on tracking your bike


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Got the RCS on my track bike and fitted a standard Brembo radial ms on the Triumph, next up will be an RCS for the BMW when the warranty expires. Wouldn't consider anything else


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I had the RCS19 fitted today to my HP4 and took it for a spin at my local track....unbelievable difference, incredible stopping power (it was wet today so didn't push too hard).

I've been struggling with braking, partly because of suspension setup but also because of the 'feel' of the brakes, which were sometimes 'grabby'. The RCS19 does away with that completely.

Thanks to Hard Racing for their advice and swift shipping!

 

I think I might have received some bad advice: Did you not HAVE to get new brake lines? Or did your Brembo RCS19 MC bolt right on and attach to your stock ABS lines?

How are you doing, by the way? It only hurts when you breathe, right?

 

Just simple answers since noone has provided them:

Billet is a machined precision part. Due to the fabrication being on CNC it's much more expensive.
Forged is as it states, a cast/forged part. This is less tolerance precise and easier to manufacture in high numbers = cheaper.

If you are interested in trying a billet master that won't rip your budget to death, AP Racing makes affordable masters that are quite good!

For track on the BMW, buy the RCS19. Cheap, reliable, good performance. I am very happy with it. You can change the brake feel by altering stroke between 18 and 20, hence the 19 abreviation in the name.

If you are looking for a serious upgrade on the brakes, use Dual Sinter pads. They are expensive, but lasts crazy long. Just changed mine yesterday. They kept up for 2000km of hard track racing, believe it or not!

Have fun

 

Great answers, here is a little more insight:

Brembo makes airtight motorcycle products for MotoGP. I mean, really great bullet-proof stuff.

They also make things for superbike racing, club racing, track day enthusiasts and aggressive street riders. All of these products are various levels of meh. Brembo knows this and couldn't care less.

On the master cylinder side, the current options are RCS which can switch between two ratio sizes and is "an improvement." Which is a fancy way of saying something you spend $250+ on is better than something your motorcycle manufacturer spent $25 on.

The fixed ratio forged models are the next up, and really around the same price. These are somehow superior (although I have no idea how) and most riders pick the 18 size, for the best amount of feel. No idea what any of that means when it's pressurizing an ABS pump and the other half of the bike.

The stock BMW ABS pump also has some sort of accelerator function in it, you push the pedal a little and get a big thump.

The next Brembo up is identical to the forged, except it's CNC'd from billet. Your first indicator that something is messed up in Brembo-land is that this model is $700! and is considered a minimum acceptable standard for pro racers. Brembo won't tell you why you would pay more than double, but I'll tell you that a Brembo engineer told me it was because the tighter tolerances had significant impact on the piston seal efficiency when the thing gets hot. YMMV, but open your eyes and ask yourself why it would cost so much and be the main race system if it has ZERO on paper performance differences.

The final model you can purchase "is for MotoGP," and costs $2800, yet has no differences on paper either. This should be another red alert for you. Here's a link:
Brembo Racing 19x18 Billet Brake Master Cylinder with Standard Folding Lever - OPPRACING Products

The actual MotoGP model is apparently different as well, and is optimized for working directly on their MotoGP calipers which are much better than what they sell over the counter.

The RCS, forged, billet and GP models all come in a standard 19x18 and span the price from $250 - $2,800.

My advice, use your head, buy the forged poor mans 19X18 model, use the savings to buy new pads and be happy you dodged the RCS.

 

For reference, I am overly satisfied with the stock calipers. I had M4 Brembos on my old bike, and I don't believe that caliper is superior to the stock BMW. Or at least, I haven't felt the limits yet.

I was however refering to this caliper: CarpiMoto - Brembo P4 32/36 Radial CNC Billet Monobloc Caliper 100mm mount - BMW S 1000 RR 12-

 

The M4 is much heavier too! I've used both and IIRC the M4 was over a pound heavier.

 

OEM S1000RR NISSIN Master Cylinder Specs.



Hello All, I searched the forum but I cant find the specs ( Piston Diameter and Piston Travel ) of OEM S1000RR Nissin Master Cylinder. Will be thankful if someone tell me.

 

Hello All, I searched the forum but I cant find the specs ( Piston Diameter and Piston Travel ) of OEM S1000RR Nissin Master Cylinder. Will be thankful if someone tell me.

What are you trying to accomplish?

 

It is always the very best idea to make some *******-tuning to front brake.
But the good thing is that Darwin alwalys collects Brownie points, and gene pool gets better.

 

for example, remove brake pads before spraying caliper with wd-40 for cleaning...i cheated darwin that time :laugh: