front brake lines , a question ?

I have done this with my 2006 Triumph Sprint ST - a much heavier bike (by about 100lbs or so). It came stock where the brake-line went down to the caliper on the right-side of the front-wheel and then fed back over to the left-side of the front-wheel. I switched it out so there were two separate lines that were fed independently from the break-fluid reservoir. In my opinion the same amount of stopping power exists HOWEVER I believe the braking is much smoother. So much smoother that I wouldn't argue anyone who said it increased my stopping power. Refilling both brake-lines and getting the air out of them separately proved a little challenging but that was to be expected seeing how that's the first time I have ever tried bleeding my brakes on my own and I didn't have on of those "cheating-tools" that makes it a lot easier.

Yes in a word....Called race style you have more fluid going to both calipers at the same time giving you less lever force for the same amount of braking and yes it should be smoother as there will be no delay between the braking force of each caliper.

better feel and not as spongy compared to a single that splits

Kiwi_rsvr said:

Yes in a word....Called race style you have more fluid going to both calipers at the same time giving you less lever force for the same amount of braking and yes it should be smoother as there will be no delay between the braking force of each caliper.

Click to expand...

Incorrect. The lever force to braking power is a ratio between the cross sectional area of the master cylinder and the total cross sectional area of the caliper pots.
It wouldnt matter if you had one line or fifty lines the ratio is still the same.
As the whole system is linked the pressure is the same in all lines and calipers whether there is one or two from the M/C.
So answer is there is no advantage to running 2 separate lines its just personal preference.

Smartarse.

ha simple hydraulics init!!

I dont believe there would be any perceptible advantage with the set up these bikes have. The splitter is quite high (second clamp) so pressures are likely pretty equal.
I dont think you are quite right tho'. If running a full line to one, and a piggy back short line over the mudguard to the next ( typical Ducati) the cross sectional area that pushes back at the first caliper ( for every action a reaction...), is equal to the cross sectional area of the second caliper. However, the cross sectional area at caliper one to the M/C , is less than it is to the next caliper....so energy is likely to work on the lever with more bias than it does on the second caliper, as it pushes back. It is about hydaulic gearing ( cross sectional area ratios )
I believe you would be hard pushed to notice any change however it was set up. Braided lines will also resist "expansion" as pressure in the system increases. And they look good. And you can get them in candy colors and with colored banjos...etc etc !
Physics Einstein...:biggrin.

The whole system is linked so the pressure is equal everywhere, both calipers will give the same braking force to the disc.
The ratio will be: area of m/c / (area of pots in caliper1 + area of post in caliper 2)

Science aside whats a good recommended aftermarket hose???

Hel, Goodridge, Cobra......Go for Stainless Steel fittings though, not the colored alloy type

Cheers kiwi!

Ive just fitted a pair of front lines to my Yamaha....colored banjos. They are NOT aluminum....
Wezmoto (Devon) do them....good prices ! New banjo bolts and washers,rubber gromets incl. Good kit. Id use him again no probs !