Athena Cylinder - Ø40mm Cylinder-piston kitRef : ATH00016A / 1013444

ATHENA Cylinder Kit - Ø40mm designed for two-stroke engines. This top-end assembly features the POWER VALVE system (PVS): a pneumatic-controlled "guillotine valve" that modulates the exhaust opening duration based on pressure conditions. Expected result: better low-end performance and effective response at high RPMs, while maintaining the reliability inherent to ATHENA components.

• System: ATHENA Power Valve System (guillotine valve) with pneumatic control
• Operation: utilizes exhaust gas pressure to adjust the opening
• Contents: includes piston ref. 241012 and gaskets ref. 601494
• Diameter: Ø 39.88 mm (referenced as Ø40 mm)
• Usage: intended for 50 cc two-stroke engines, suitable for urban use and daily commuting

Manufacturer reference: P400105100008

Compatible with many scooters and small sport bikes — among common applications: DERBI SENDA X-TREME 50 SM (2022), APRILIA RS4 50 (2016), and GILERA SMT 50 (2007). Before installation, verify engine compatibility and consult a tuner or motorcycle mechanic if necessary. This product is aimed at riders seeking a reliable and responsive top-end for urban use.