They're the stock lines?
Never heard of rust in the actual line... aren't the cables SS??..
I'm dumbfounded... i've been riding dirtbikes all my life, dropped in rivers, left outside their whole life and never heard of the clutch line getting rusty. Huh... My V for reference is stored outside 95% of the time and the only thing that gets occasional rust (that i know of) are the brake rotors.
Maybe the line was damaged from the tip over or maybe from something else?
Oh PS my V blew over recently with no bags on it lol
65cc Benelli Dynamo
Yamaha Yz426-f (current)
2010 Kawasaki Versys! (very current and loving it!)