Prox Casted Piston kitRef : PRO00215A / 1094469002

PROX cast piston designed for the maintenance of small displacement motocross bikes. Machined from aluminum, this piston in oversize +0.01 (letter B) features a diameter of Ø 39.47 mm (39.470 mm) and a standard compression geometry, providing a reliable replacement solution for common engine interventions.

• Manufacturer reference: 01.6019.B
• Brand: PROX
• Material: Cast aluminum
• Diameter: Ø 39.47 mm
• Oversize: +0.01 (letter B)
• Compression: Standard

Designed for the motocross world, this piston is aimed at riders and mechanics looking for a robust part for 50 cc engines. The cast construction ensures a homogeneous structure; its oversize allows it to fit cylinders bored to +0.01 mm. Before installation, check the condition of the cylinder, rings, pin, and clips, as well as the lateral play and bore to ensure proper operation and a smooth break-in.

Common compatibilities: KTM 50 SX (2025), HUSQVARNA TC 50 MINI (2024), GAS GAS MC 50 (2024) — check the reference and engine dimensions before purchase. A simple and precise spare part for maintaining or restoring your motocross engine.