I seem to remember my bike having a similar smell when new, I put it down to residue left in exhaust during manufacture and possibly oil/wax left on the engine burning off. in any case it went away after a few rides/washes.
I occasionally smell some burning still, usually at the beginning of a ride and when stopped at a red light, that's when some chain lube has made its way onto the exhaust. Smell goes away after a few miles.