The nuovo Monster 821 is driven by the twin-cylinder Desmodromic Testastretta 11° with a displacement of 821 cm³, designed to be a structural element of the chassis. " "The engine ""breathes"" through Ride-by-Wire commanded throttle bodies, is Euro 4 approved (only for countries where Euro 4 standard applies) and ensures a maximum output of 109 hp (80 kW) with 9,250 rpm and a maximum torque of 8.8 kgm (86 Nm) at 7,750 rpm. Developed to ensure a delivery of full and progressive torque at every speed, this engine guarantees fun and usability that are within reach of all. Furthermore, long maintenance intervals calling for the control of valve clearance every 30,000 km make the Monster 821 a reliable and accessible bike.