You don't have to, but, personally I would reroute it just because I don't like tight bends and stress at joints (banjo bolt connection to the brake line). There's nothing to fear, but if you keep the handlebars and ever consider new brake lines I'd select a line more appropriately sized for those bars (which is a bit ironic since most of the time the issue with new cruiser bars is lines are too short).
You could keep the loop from going up if you ditch the factory cable guide and relocate the hold down point. If you can move that point closer to the center of the triple tree you could get some of that tight radius out and maybe come straight out of the master cylinder instead of pointing up. Try it with some zip ties and see what you come up with. There are many cable clamps available in the aftermarket.
2013 V Star 1300 Deluxe
OEM Tall Sissy Bar
Memphis Shades Fork Deflectors
Bridgestone Exedra Max Belted Tires
Baron's RSTD 7308 bar
Last edited by sparkn; 07-03-2015 at 11:10 AM.