Rear Brake Failure

I had to let my bike set for 2 years due to a back surgery. I'm trying to get back on. I put in a new lithium battery and took it for a test drive. I was quite excited to see that my rear brakes had completely failed. I got back home and checked the fluid level but it was completely dry. I plan on replacing the whole rear system but I want to start with the lines because I read that Harley's Vrod lines were known to collapse. Any recommendations on brake lines as I consider braking to be important, lol. I have a VRSCD. Thank you!