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

PROX piston kit for Yamaha Grizzly 660 (4-stroke)

The PROX piston kit is specially designed for the 4-stroke engine of the Yamaha Grizzly 660. It contains all the necessary components to repair or replace the piston in the engine. The kit offers a precise fit and is tailored to the technical requirements of the 660 cm³ engine.

Technical features

• Brand: PROX
• Engine type: 4-stroke
• Bore size: 100.50mm
• Bore oversize: +0.50mm
• Piston skirt: uncoated
• Piston shape: flat at the top (mirror head)
• Material: Aluminum alloy, cast
• Compression ratio: 9,2:1
• Displacement: 660 cm³
• Number of pieces: Kit (piston and rings)

Product description

The cast aluminum alloy piston is designed for use in 4-stroke engines such as the Yamaha Grizzly 660. The bore size of 100.50 mm with an oversize of 0.50 mm enables precise installation after an overhaul of the cylinder. The uncoated surface of the piston skirt is intended for use in standard engines and ensures reliable function with correct maintenance.

The flat top of the piston (mirror head) contributes to a compression ratio of 9.2:1, which ensures balanced power and efficiency in the engine. In addition to the piston, the piston kit also includes the matching piston rings to ensure optimal sealing and functionality.

This piston kit is part of the Engine Group and belongs to the PISTON + RING KITS product group. It is suitable for replacement during maintenance or repair and helps restore the engine performance of the Yamaha Grizzly 660.