Brake lines for dual caliper front brakes

Started by battlecry, January 25, 2010, 10:15:22 AM

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battlecry


Why are three different designs and which one is "better"?

I have seen two lines from the MC, one to each caliper, an h shaped single line from the MC to both calipers, and one line from mc to one caliper with a separate line from that caliper to the next.  Seems if you want better feel with less line stretch you would not choose the dual lines from the mc, and if you want less unsprung weight, you would not choose the dual lines from the caliper.  Even the h lines are available with the tee fitting above the lower triple on Monsters and below on Superbikes. 

Why would you not choose an h line for the street?

ducpainter

I don't think you'll notice any difference in feel with today's braided lines.

I have an H line ala SBK on my bike.

Use what ever you like the looks of.
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Speeddog

The SBK h-style, with the Tee at the fender will be the lightest, and provide the stiffest lever, due to having the least amount of hose.

but like DP said, very little to be had in it versus the other styles.
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battlecry


Thanks, that seems like a natural choice to me.  Don't know why you would want the complication, weight, and expense of the dual line setups. 

NorDog

Yeah, I don't think you'll notice any unsprung weight problems regardless of you choice.  On my Harley I went with a single line to double banjo on the right caliper, and then a single line from there, up and over to the left caliper.

Why?  Because of probably the least important reason of all: I thought it was cool.
A man in passion rides a mad horse. -- Ben Franklin


junior varsity

I have the t-junction in the middle, so I guess that's the "h" shape.

Two lines from the master is cluttered. Boo clutter.

slowkitty

The eBay bloke sells the 2 to 2 for the front ... I'm getting it soon and will see how it goes. Personally I thought that this is more elegant than the "h".

http://cgi.ebay.com.sg/Goodridge-Braided-Brake-Lines-Ducati-M750-Monster-750_W0QQitemZ390129666425QQcmdZViewItemQQptZUK_Motorcycle_Parts?hash=item5ad58a4979

Cheers

junior varsity

I would much rather have the double banjo at the caliper, crossing over the fender to the other caliper, much much more than two cables at the master coming down and travelling down each fork tube.

ducatiz

Quote from: ato memphis on January 26, 2010, 11:37:24 AM
I have the t-junction in the middle, so I guess that's the "h" shape.

Two lines from the master is cluttered. Boo clutter.

h shape is two lines, one long from the master and one short from caliper to caliper.
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junior varsity

then I prefer "t" shape.

I was thinking of "h" shape as being the "l"+"n" shape. We need distinct nomenclature.

junior varsity


NorDog

Quote from: ato memphis on January 27, 2010, 04:51:30 AM
I would much rather have the double banjo at the caliper, crossing over the fender to the other caliper, much much more than two cables at the master coming down and travelling down each fork tube.

I've heard that racers use the two hoses from the master cylinder to the calipers because that set up is easier to bleed.
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junior varsity

Hmm.  I have to say I'm a really big fan of the speedbleeders I put on my Brembo Goldlines, and bleeding is REALLY easy, I can see how in an "h" setup that air could sit in the top bend. In my T-junction, I don't really have that problem. My thoughts are that racers want the speediest bleed setup, and the two lines would be it. Also, they are less concerned with cosmetics and don't have pesky things like headlights and turn signal wiring to also contend with.

My new calipers (on the shelf right now, going to be rebuilt) have 2-bleed nipples (one per piston bank) per caliper.

ducatiz

Quote from: ato memphis on January 27, 2010, 05:10:41 AM
then I prefer "t" shape.

I was thinking of "h" shape as being the "l"+"n" shape. We need distinct nomenclature.

fudge, i dunno.  i thought it was two separate lines with one of them a crossover caliper-to-caliper -- with a double banjo on one caliper, single line running to the master.

it might be a single line with a sideways T.  i drew it in my head, whaddya say?

Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

junior varsity

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