My first post and hopefully it's not too obscure...
I've had 2 Street Triples, the latest being the amazing 765 RS, with brakes that make everything else pale in comparison.
I recently picked up a 2013 Daytona 675R (w/ ABS) for track days (intermediate group). I've only done one track day on it so far but the brakes seem a little spongy and numb with more lever travel compared to the 765 RS. It appears that the Daytona has the M4 Brembos whereas the RS has the M5/M50 as well as a different master cylinder.
I'm thinking about the M50 upgrade to the Daytona and wondering if anyone else has done it and if it's yielded improved results for them. It sounds like the ABS unit in the Daytona leaves something to be desired but I'd really like the system to be a little more confidence inspiring like the RS.
Following the first track day I flushed the front brakes on the Daytona and checked pads and rotors (lots of meat on both and clean). There still seems to be noticeably more travel in the Daytona brake lever than the RS. Yes, I did also bleed the master cylinder. I've not yet been able to give it a good shake down yet though I have another track day tomorrow.
If I do the M50 upgrade, I'll likely get the same master cylinder as the Street Triple (actually seems like it might be cheaper to buy it that way too).
So, in sum, I'm wondering if anyone else has upgraded to the M50 and corresponding master cylinder on their 2013+ Daytona 675R and how the results worked out?
The M50 is also an M4 with a piston diameter of 30mm. The stock M4 on your D675R is M4.34 (34mm pistons) and the M50 is M4.30 (30mm pistons). The Brembo marketing named the M4.30 calipers M50, simply because it was launched on the 50th anniversary of Brembo ;)
If I were you I'd start with the M/C first. The Brembo 19RCS M/C is the best upgrade on my bike so far, together with the D675R front-end. Brembo also has a newer version of the 19RCS, called the 19RCS Corsa Corta with 6 different braking modulation options
. Apparently RidersDiscount has them in stock too. For more info you can also see their forum thread here:
RidersDiscount 19RC Corsa Corta.
Brembo 19RCS (or 19RCS Corsa Corta) M/C combined with Motul RBF 660 brake fluid and suitable brake pads, will give excellent feel and satisfactory braking power both on the street and track without braking the bank IMHO.
If your D675R is going to be a dedicated track bike, and your mind is set on the M50 (a.k.a M4.30), or you simply want to try it out, it's best to disable or bypass ( as @MGFChapin
suggested) the ABS first. The ABS system has a mind of its own, and with ABS enabled I highly doubt that you'll see any difference or gains between the M4.34 or the M4.30 calipers if there's any.
The suitable M/C for the M50 is the Brembo 17RCS M/C. It may be a better option than the Brembo's MCS M/C (oem) on the RS. @jdgun_13
has more knowledge and experience on the M50 so he can make other suggestions as well. JD helped me a lot when I was doing the D675R front end conversion.