The diameter of the cylinder, doeas affect the leverage you have over the calipers, so yes it will have an impact if you go with a diff diam cylinder. For me, it's more about bleeding, than anything else. You shouldn't need to change the diam of the MCyl.I've see a few posts and sites that recommend upgrading the master brake cylinder.
Can anyone advise me what you gain out of this upgrade. (I currently have the standard cast iron floating discs and 2 pad front calipers on my F.E.)
Most recent Ducs have had 320mm discs, I think the switch to 330mm was only on the 1098's/1198's. Still a lot bigger than most sportbikes which have a lot of 300-310mm discs.Ducs have 330mm discs which is about as big as it gets
Thanks for all the help so far.P.S. dollar-for-dollar, upgrading the master to say a Brembo billet for example, is a complete waste of money if outright performance is your goal. If bling is your goal, then hell yeah!
But, Ducs have 330mm discs which is about as big as it gets and gerat Brembo masters stock. So, if performance is still an issue, as it was for me, spend the money on calipers. That's where your power comes from.
Disc/pad combinations can have an enormous impact too. It's a bit of a black magic.
Thanks Muschi, I've corrected my previous post.you seem to confuse the terms master cylinder and calippers,
the things at the wheels are the calippers, yours have got 4
pistons each too, they are just a little smaller than the P4 34/34
ones, the master cylinder is mounted at the handlebar.
supersport and superbike calipers both have four pistons each, that's true,Muschi I thought that both the early and later calipers had four pistons. But I thought the later ones had four pads Vs the earlier model calipers 2 pads?
Is there an advantage in that there is less 'mounting flex loss' in a radial set up?supersport and superbike calipers both have four pistons each, that's true,
but supersport calipers always came with two pads per caliper.
superbike calipers had 4 pads for a short time only, these calipers are
easy to detect visuably.
they are found on the 999 as far as i know, maybe some late 998 too,
1098 monoblocs got 2 pads per caliper only.
supersports have got P4 30/34 calipers, instead of the P4 34/34 ones
from the superbikes, that is why supersports came with PS 16 masters
and not 18mm masters like the superbikes did.
It is a matter of surface ratio between the added caliper pistons and the
surface of the master cylinder.
Joe,I have the stock master cylinder and stock cast iron SP front rotors with galfer green pads and the 65 mm 2-pin calipers (I put these on because I switched to Superbike forks which won't work with the stock 40 mm caliper bolt spacing). I would not want more power; they are strictly 2-finger brakes which will do stoppies no problem if I'm not careful at the track. I would think even with the stock calipers you would still get plenty of front braking! Try the Galfer greens; they're easy on the unobtaineum cast iron rotors too.