Yamaha YZ 426 [PROX] – piston kit for 4-stroke

PROX piston kit for Yamaha YZ 426 4-stroke engine

The PROX piston kit has been specially developed for the 4-stroke engine of the Yamaha YZ 426. This is a complete standard size A piston kit that contains all the necessary components for piston replacement.

Technical features

• Bore size: 95.00mm (standard)
• Piston size: 94.95mm
• Displacement: 426 cm³
• Compression ratio: 12,5:1
• Material: Aluminum alloy
• Coating of piston skirt: uncoated
• Engine type: 4-stroke

Product details

The piston is made of a high-quality aluminum alloy, which offers good thermal conductivity and stability. The uncoated surface of the piston skirt corresponds to the standard and is matched to the standard bore of the Yamaha YZ 426. The kit contains all the necessary parts for installation and is designed for use in the original engine.

The piston set is part of the ENGINE GROUP and is classified as PISTON + RING KITS. The standard A size ensures a precise fit in the cylinder with a bore of 95.00 mm. The compression ratio of 12.5:1 is tailored to the engine design and supports efficient combustion.

The PROX piston kit offers a reliable solution for maintaining or repairing the Yamaha YZ 426 4-stroke engine. It is suitable for replacement when the piston is worn or damaged and helps restore engine performance.