I went with after market cables and there is no part number. If you look at your set up right now, the two lower brake lines come together at the junction and then one line goes up to your brake lever. Well the line from your caliper to that junction will remain the same. Measure from the junction to the lever and you will get ?? inches. Tell who ever you order your cables from, you need an upper brake line ?? inches and they will make/order it for you.
You'll also need to change out your Master Cylinder to 9/16... I just went with one line all the way and removed the junction... just like on a softtail...
Got the 9/16 master cyclinder on order with the 6 piston caliper. Just looking for the part number for the break line that would fit the best...Thanks!
I went back to dual fronts, just measured the barke line left in my garage... 56"
hope this helps... and Manish is right... I don't think you're gonna find a part number....
+2, +4, +6 and so on is how I've always understood it...
I used the Goodridge Universal brake lines from J&P Cycles. you buy the banjo ends for the m/c and caliper, then get the brake line in whatever length you need to connect them. I have used this setup on 2 different bikes and it works great. Comes in either black braided stainless or regular braided stainless. I used black cause my other lines are stock black.