OK, who's going to educate me? Brembo m/c's, what are they all about. There loads of 19x18 Brembo's available everywhere at decent money, but what's the difference (apart from price) than going for the 19X20 unit. I'm your typical 'Joe-Public' road rider. No trackdays on the 'Blade, that's why I'm building a track bike, educate me.
Brembo RCS will give you more stopping power and better feel. I would recommend going for it only if u think u need more stopping power. The Adjustment on piston 19x18 or 19x20 is about the BITE as far as i know.
19mm is the piston size, the 19x20 is the pivot point, you have the same power but different feel depending on where the pivot is for example easy to pull with lots of travel, hard to pull not so much travel.. Some reading for you:- (from Shazaam) Let me answer the part about braking power first. Changing your stock master cylinder to an aftermarket radial design will NOT give you more braking power to help you stop sooner. A radial master cylinder with a different piston diameter and/or lever fulcrum-to-piston distance will only change the feel of the brakes at the lever. So keep in mind that Ducati/Brembo chose a master cylinder size to give you the best modulation characteristics (feel, sensitivity and control) for your bike. Good modulation means good feedback to the rider during a stop. A good braking system needs to establish the closest linear relationship possible between the force applied to the brake lever and the actual deceleration of the bike. Stopping power is technically easy to achieve, but achieving it along with good proportional braking response is more difficult. This, I feel, is the major factor influencing braking quality. That’s not to say that the Ducati engineering department’s choice is best for all riders or riding conditions. The best choice for the track isn’t the best choice for the street. Different riders have different preferences and we’re all adaptable. A rider is able to compensate for one performance drawback to gain an advantage with another. But again, it's situational dependent; a braking system that gives repeated stops from 150mph with the force application of one finger is not necessarily optimum for a 40mph panic stop in traffic. Even though a rider is adaptive to a braking system's general behavior doesn't mean that in an emergency that he'll use a light one-finger pull to stop. So let’s move on to your choices. First, there’s a different master cylinder size requirement for single rotor systems than for dual rotor systems. A dual rotor set-up has a lot more caliper pistons to move so a larger volume of hydraulic fluid has to be moved by the master cylinder piston. Also, since different Ducati models have different size calipers and rotors you can’t always translate a recommended master cylinder size to another setup. A master cylinder size designation is written AAxBB where AA is the diameter of the piston in mm, BB is the fulcrum-to-piston distance in mm. The master cylinder piston diameter is chosen based on the number and size of the caliper pistons. A fulcrum-to-piston distance affects two things: the amount of force needed at the lever, and the distance that the lever needs to be pulled through (to displace and compress the same amount of hydraulic fluid which in turns forces the caliper pistons against the rotor discs) to yield the SAME stopping power. Single Disc The Brembo aftermarket radial 16mm diameter master cylinders offer you the choice of a brake lever fulcrum-to-piston distance of either 16mm or 18mm. The stock Brembo lever has a 16mm dimension. So your choice is either 16x16 or 16x18. From the geometry, a 18mm lever will need to be pulled a 11% shorter distance than a 16mm lever but will at the same time require more lever force than a 16mm to stop the same distance. Dual Disc The Brembo aftermarket radial 19mm diameter master cylinders offer you the choice of a brake lever fulcrum-to-piston distance of either 16mm, 18mm or 20mm. The stock lever is 16mm. So your choice is either 19x16, 19x18 or 19x20. 19x16 (stock) requires the least less lever effort but the longest pull distance. 19x18 requires 11% lighter pull and 11% longer pull distance than the 19x20 MC. More feel (better modulation characteristics) than the 19x20 19x20 requires the most lever force but the shortest pull. More like a trigger action. Some riders think that this short-pull trigger action means that they have "better" brakes, but they don't - at least not for all riding conditions. What they do get is the same braking power with poorer modulation (feel) characteristics. Good for the track perhaps, but often dangerous on the street, especially in the wet. In an emergency, most of us have the instinct to grab a brake hard. So if you value a better feel, when choosing between the 19x18 and the 19x20 for the street, go for the 19X18. Better still stay with Ducati’s choice, 19x16. On the other hand, some prefer their lever hard. So again, I'm not suggesting that every rider will have the same preference in a braking system's modulation characteristics. Depending on your preference (or need) you can have brakes with an initial vague feeling, a strong initial bite, or something in between. You can select pads that have better high temperature behavior. On a race bike you can select brake pad and rotor material that will survive a race without needing replacement, but on the street, materials need to be more durable and function under less severe braking conditions and more varied weather conditions. Master Cylinder Piston Diameter Selection Brembo makes 16mm diameter piston master cylinders for use with single caliper brakes and 19mm diameter for use with dual calipers. Why? To give the proper modulation characteristics at the lever. The different diameter MC pistons change the hydraulic relationship between the master cylinder and the caliper pistons. The hydraulic advantage is the total area of the caliper pistons divided by the area of the master cylinder. For example: The Brembo Goldline front caliper has four pistons. Two are 30mm diameter, two are 34mm. The Brembo Monoblock front caliper has four pistons. Two are 32mm diameter, two are 36mm. Case 1: A single Goldline actuated by a 16mm MC. 2(30 x 30 + 36 x 36) / (16 x 16) = 2(900 + 1296)/256 = 17 >13 Case 2: Dual Goldlines actuated by a 19mm MC. 4(30 x 30 + 36 x 36) / (19 x 19) = 4(2196)/361 = 27 < 24 > 23 (firm) Case 3: Dual Monoblocks actuated by a 19mm MC. 4(32 x 32 + 36 x 36) / (19 x 19) = 4(1024 + 1296)/361 = 27 < 26 > 23 It has been my experience that there is a "sweet spot" in the range. I like ratios in the 27:1 range-2 finger power brakes, feeling some line and/or caliper flex. 23:1 is at the other end of the spectrum-firm. Case 4: Dual Goldlines actuated by a 16mm MC. 4(30 x 30 + 36 x 36) / (16 x 16) = 4(2196)/256 = 34 > 27 (loose) Case 5: A single Goldline actuated by a 19mm MC. 2(30 x 30 + 36 x 36) / (19 x 19) = 2(900 + 1296)/361 = 12 < 23 NOT GOOD Ratios lower than 23:1 produce a lever feel so "wooden" as to have little, if any feel. Hope that helps.....lol
lol, just get the 19RCS if you can afford one, or bikerdiscountstore.co.uk for Accossato masters http://www.bikersdiscountstore.co.u...radial-brake-cylinder-folding-lever-pd-77.php
18 will be easy to pull with more travel.. You gotta love this span adjuster:- http://www.bikersdiscountstore.co.u...adjuster-for-accossato-brake-levers-pd-93.php
Ive got a factory spec 18x19 mag brembo Radial m/c, it gives way more feel, way more power and is way less prone to fade, ive got a lightec folding lever & remote span adjuster on mine, came straight from smr racing
Nice, The full WSB/MGP spec cnc mag Brembo master 19x18 seen here is £2,100.00! Same as used on Rossi's M1.
That be the same as mine then. except it has the new rcs side span adjust, mine is the old front adjust. ill take a pic. funny to think thats what they cost, as i paid way way less than that pmsl
lol nice find mate, standard spec cnc masters are around £600.00 but the real deal is as I pictured.. You can see it here:- CarpiMoto - Radial Brake Master Cylinder Brembo 19x18 CNC master here:- CarpiMoto - Radial Brake Master Cylinder Brembo 19x18 CNC
Gareth, We have a few Accossato 19 PRS master cylinders instock at the minute. Pretty much the same as the Brembo RCS. 19mm bore with the adjustable lever span to give you the ideal feel you want. Made in Italy, by a crowd who used to work for Brembo, look almost identical, proper quality. Lots of guys using their kit now including BMW in World Superbike and TAS Suzuki closer to home. Reckon we could do a good deal for you on one, alternatively we can supply Brembo kit too. Cheers
Can do an Accossato PRS (Adjustable Ratio) for £199 or the Brembo 19x18 would be £225 Have the Accossato on the shelf if you want a look.
Nice one Jonny, I'll try and get up and see you. Heading to the NEC next week hoping for a non-existant bargin LOL
