Prox Full cast size A Piston kitRef : 245001DA / 1094593001

PROX Cast Piston – Ref. 01.6249.A

Designed for motocross engines, this PROX cast piston is aimed at riders and mechanics looking for an original part for engine overhauls. Precisely machined from aluminum, it features a flat top and machining for reed valves, suitable for the engine architectures related to the KTM 200.

• Diameter: Ø 63.94 mm (63.940 mm)
• Oversize: Letter A (first oversize)
• Compression: Standard
• Material: Aluminum
• Finish: Mos2 skirt treatment for better sliding and wear protection
• Geometry: Flat top with reed valve machining

The Mos2 treatment applied to the skirt reduces friction between the piston and cylinder during break-in, while the machining for reed valve clearances ensures compatibility with specific valve profiles. This part is suitable for installations where oversize A is required after reboring.

Main compatibilities (examples):

• KTM 200 EXC (2015, 2016 - 200 cm3)
• KTM 200 SX (2004 - 200 cm3)

Always check engine dimensions and the reference before ordering to ensure proper fit and assembly tolerance.