Quote:
Originally Posted by
JMo
The main reason for using
two separate lines directly from the master cylinder is to ensure equal pressure at each caliper - this is typically on road/sports bikes that have one hose to the first caliper, then a short bridging hose over the front mudguard to the second caliper (eg. Ducati 996).
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This has always puzzled me, because I'm pretty sure the highlighted bit is, in scientific terms, utter tosh. In terms of hydrostatics, the pressure is the same everywhere, and I don't think the fluid's moving fast enough or far enough for hydrodynamic effects to be significant.
But, AFAIK, it's a requirement for road racing. So someone, somewhere has decided that not only might it reduce the effectiveness of your brakes, but in fact it does so
to such an extent that it's dangerous to have a three hose system. I'd be intrigued to know why. I suppose you've got slightly more leak points in a three hose system (ten as opposed to seven - everywhere you have a copper washer)
Mysterious.