Powerplant
The 660cc forward-facing twin-cylinder engine, a compact and lightweight latest-generation unit, already delivering record performance for its class, now complies with Euro 5+ standards. With the adoption of larger diameter throttle bodies (52 mm instead of the previous 48 mm), the RS 660 now outputs 105 HP. The engine also acts as a stressed member, contributing to a compact, lightweight, and rigid structure through a twin-spar frame bolted to the steering head and rear, in keeping with Aprilia’s tradition of refined chassis design.