Engine & Performance This 399 cm³ liquid-cooled, 4-stroke in-line four engine delivers exhilarating performance, producing 57.0 kW (77 PS) at 14,500 rpm — rising to 58.7 kW (80 PS) with RAM Air. It features a high 12.3:1 compression ratio, DOHC with 16 valves, and a short-stroke design (57.0 x 39.1 mm) for rapid, high-revving power. The 6-speed return-shift transmission and wet multi-disc clutch provide smooth and precise gear changes. With fuel injection (34 mm x 4), digital ignition, and forced wet sump lubrication, it ensures sharp throttle response and engine reliability. Emitting only 120 g/km of CO₂ and consuming just 5.1 l/100km, it delivers both performance and efficiency.