Really something I see anything of. There was one place in Sodua rented out this yellow chopper for a while but it wasn't a big bike, maybe 250-300cc. If you can track skinny down in Sosua he is daft enough to lend you his x1 for a €1000 deposit and some cash, but nothing legit.
Bikes get stolen in the capital if left for 30 minutes without a guard so no one has anything larger than a colmado bike or 125 spak.
I don't fancy your chances in Sd but try Boca , might get lucky on something.