Nice! For a while, YSR's would swap in a DERBI powerplant to make a Yerbi.
I've wanted a GPR ever since I saw one ride by in Pittsburgh in the mid 90's... Alas, they're a rare breed. And the YSRs, while cool too in a less refined way, are getting dated.
Too bad the NSR's aren't street legal...
I'd get in line to inquire if you ever sell, but I won't be able to afford it -- my Ninja 300 '14 is eating my spare cash.
But if you think motorcycles are expensive, get a horse.
Might as well bale cash and feed it to the critters.
Nice work, man! Sub'd.
~Ted