Yamaha Grizzly 660 [PROX] – Piston kit for 4-stroke

Piston Kit for Yamaha Grizzly 660 – PROX

The piston kit from PROX is specially designed for the 4-stroke engine of the Yamaha Grizzly 660. It offers a precise fit and supports engine performance through high-quality materials and workmanship.

Technical features

• Bore Size: 101.00mm
• Bore oversize: +1.00 mm
• Displacement: 660 cm³
• Compression ratio: 9.2:1
• Piston skirt: uncoated
• Shape of the piston: flat at the top (mirror head)
• Material: aluminum alloy, cast
• Engine type: 4-stroke
• Scope of delivery: Piston set (kit)

Product description

The PROX piston set is made of a robust cast aluminum alloy, which ensures a long service life and good thermal conductivity. The uncoated surface of the piston skirt supports optimal lubrication in the cylinder. The bore size of 101.00 mm with an oversize of +1.00 mm allows for precise adjustment during engine revisions or performance adjustments.

The flat shape of the piston (mirror head) contributes to a balanced compression ratio of 9.2:1, ensuring efficient combustion and stable engine running. The kit contains all the necessary components to replace the piston in the Yamaha Grizzly 660 4-stroke engine.

The piston kit is part of the Engine Group and belongs to the product group of piston and ring sets. It is suitable for use in original or remanufactured engines and helps restore engine performance while maintaining manufacturer specifications.