Differences in Brake line routing

ROCKETOUR

.060 Over
Joined
Feb 28, 2010
Messages
111
Location
Northern California
Ride
2008 R3T with lots of changes
Hey out there in Rocket land. Any hydraulics experts out there? (I only got a C in Engineering Hydraulics ) I have a question.
I've seen 3 different ways that manufacturers route front brake lines.
1) 1 line from master cyl. to "Y" branch and then two lines to the calipers.
2) 1 line from Master cyl. to right caliper, then a "jumper" line over to the left caliper.
3) 2 full length lines from master cyl. directly to the calipers.

My question: Can somebody explain which method would preform the best. Back when I was roadracing, we used to go with #3, but this is an R3T. Is there any difference in how the 3 different methods will work? I used to have a Suzuki and it used method #2.
I'm working on "a little brake mod" and need to know so I can get the right braided S.S. lines. Any help would be appreciated. Thanks.
 
First cylinder inline will move first and then the second. In practice both calipers clamp to the same wheel so you don't feel a pull one way or the other. A slight differnce in wear however. Ideal is to split into two equal length lines running to the calipers. Dual lines from the master originate from a single internal orifice so it is in effect split as with an external tee and two lines. I wouldn't change from one style to the other unless I was changing lines for another reason.

Hope this is useful. Speedy
 
When I installed the PreTech 6 pots up front I installed dual lines from the master cylinder.
Unless you are racing, I doubt you will feel a difference with any of the 3 setups.
 
When I fitted my 6 pots I used goodridge splitter under bottom yoke.
 
I was looking at some new Triumph 675s last week while waiting for my tire to be mounted. I noticed they were plumbed with one line to the right caliper and then a jump over line from the right to left caliper.
 
Speedy said:
First cylinder inline will move first and then the second.
Click to expand...

I may be missing something, after all I'm old and potentially feeble minded, but the best I remember my fluid dynamics everything in a hydraulic system sees the same pressure at the same time. It's not like water moving down a pipe and it isn't a matter of which device is closer to the brake lever. The master cylinder applies pressure to the entire system at the same time so whatever is in the circuit with the master cylinder gets the same pressure applied whenever you pull on the brake lever...or near enough that you will likely never be able to tell the difference unless you put a device in the circuit that measures in milliseconds. Just my $0.02 and I'm sure someone with more expertise will pipe up shortly...
 
ROCKETOUR said:
1) 1 line from master cyl. to "Y" branch and then two lines to the calipers.
2) 1 line from Master cyl. to right caliper, then a "jumper" line over to the left caliper.
3) 2 full length lines from master cyl. directly to the calipers.
Click to expand...
From experience - option 3 is MUCH easier to bleed.
 
+1 on that.
I was able to do essentially a gravity bleed of both calipers with the 2 lines.
 
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