Q. Does this bike sounds like a superbike with stock exhaust - Ninja 650?

Its a parallel twin with 180 degrees firing interval. It sounds like a single cylinder engine may be because both the cylinders firing time is close to each others' . No matter any after market exhaust is fitted the volume might get higher but the sound signature doesnt change.

If you even add 100 sc exhaust it will not sound like super bike not even close to zx6r.

Not like in a 4 cylinder .