Engine: 44 hp From a Single—Strong in the Midrange, Requires Right Revs

The RC 390’s 373 cc single-cylinder engine produces 44 hp at 9,000 rpm and 37 Nm at 7,000 rpm. It uses DOHC valve gear, four valves, and carbon-coated finger followers to reduce friction and improve reliability under sustained use. Ride-by-Wire enables traction control and more precise engine management. A slipper clutch arrived with this generation: it opens when reverse torque from the engine becomes excessive and closes through spring pressure, preventing rear-wheel hop during hard downshifts while hejiuxfmfprqaoeoxuxvdbxnwaadylqpjg

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