
PROX Forged Piston (manufacturer part number: 01.6608.B) — forged aluminum piston designed for Cross and Roadster applications. Made from a specific alloy, this PROX piston minimizes friction and ensures reliability suited to the demands of sport and off-road riding.
Designed to replace an original piston in oversize B, this piston is aimed at riders looking for a robust part for the engine block of the mentioned 690 cm3 models. Thanks to its forged construction, it features the mechanical characteristics needed to limit internal friction and maintain bore tolerances under load.
Main compatibilities (examples): KTM 690 SUPERMOTO SMC (2011), KTM 690 ENDURO R (2011), and KTM 690 DUKE (2011). Always check the necessary dimensions and oversize before installation to ensure compatibility with your engine's cylinder and segments.