ATHEN CYLINDER 39,88MM

This POWER VALVE SYSTEM 2-stroke engine top end regulates the exhaust opening time for excellent performance at low revs and optimised performance higher in the rev range.   ATHENA Power Valve System: "guillotine valve" installed with a pneumatic system Operates using exhaust gas pressureOptimises performance and retains maximum reliabilitySupplied with 241012 piston and 601494 gaskets