Vertex Top End Piston Cylinder kitRef : VER00737A / 1149521003

Manufacturer reference: VTK23630C-3 — VERTEX top-end kit designed for motocross riders looking for a complete and ready-to-install replacement. Designed to simplify the restoration of the top end, this kit includes piston, rings, and assembly components to get back on the road (or track) without searching for individual parts.

• Included: piston, rings, piston pin, circlips, top-end gaskets, and for 2T applications, a needle cage. (4T kits include a timing chain.)
• Main features: piston compression: Standard · bore diameter: 66.40 mm · piston diameter: Ø 66.36 mm · oversize: C · material: aluminum.

The aluminum piston offers reduced weight and thermal conductivity suited to the demands of motocross. The designation "oversize C" corresponds to the machining tolerance and allows for precise identification of the overbore for the piston and cylinder. The kit contents gather essential wear parts (rings, pin, circlips) and gaskets for a clean top-end rebuild without unpleasant surprises.

Compatibility (declared examples): KTM 250 SX (2026 - 250 cm3), HUSQVARNA TE 250 (2026 - 250 cm3), GAS GAS MC 250 (2026 - 250 cm3). Always check the manufacturer reference for pairing confirmation before installation.