Wiseco 4-Stroke Forged Series - ø77.00mm Piston kitYAMAHA 250 YZ 250 F (CG34) - 2014 - 2015Ref : WI00156A / 1122571002

The WISECO 4T Forged Series piston kit - ø77.00mm (manufacturer reference W40116M07700B) is aimed at motocross riders looking for a reliable replacement part or a solid foundation for engine tuning. Made from forged aluminum, it carries the Wiseco legacy: nearly 50 years of expertise in producing high-performance and durable pistons.

• Piston diameter: Ø 77.00 mm (size B) — actual Ø 76.960 mm
• Compression: high compression
• Material: forged aluminum
• Delivered: kit (rings included)
• Universe: Motocross — suitable for high-stress machines
• Reference: W40116M07700B

Designed to withstand the demands of high RPMs and the repeated cycles typical of off-road riding, this piston offers the robustness expected on a machine like the YAMAHA YZ 250 F (CG34) 2014-2015 (250 cm³). Its forged aluminum combines lightness and good thermal conductivity for prolonged use. Ideal for standard replacement or as part of an engine tuning project, this kit allows for precise bore tolerances and suitable sealing for the cylinder.

Always check compatibility with your cylinder head and bore before installation, and follow manufacturer recommendations for break-in and ring installation.