The 2026 Aprilia RS 660 with our velocity stacks making some good numbers. 🔥 This wasn’t developed by chasing a peak dyno number. We tested 25%, 50%, 75% and full throttle, logged the bike on the street, and backed everything up with GPS testing in the real world. ✅ 95 → 101 WHP on 93 octane (less with lower octane) ✅ Stronger power throughout the RPM range ✅ Improved low and midrange throttle response ✅ Half a second quicker 20-100 MPH with GPS testing ✅ Higher RPM limit and a wider usable pow

Motori RTZ 500 Zanella — ficha y novedades RTZ 500