In comparison, the RC 390 uses KTM’s previous-gen 373cc single-cylinder ... In fact, for some riders, the RS 457’s deep exhaust growl alone will be worth the extra money.

Taking its design cues from the MotoGP™ RC16, the exhaust of the KTM RC 390 boasts stainless steel headers with an aluminum muffler, which not only look the part but give the KTM RC 390 a ...