Cylinder Athena Yamaha YZF 450 R 09-25

Athena Standard Bore Cylinder for Yamaha YFZ 450 R and YFZ 450 X.

If the engine has lost compression, consumes oil, or no longer delivers power as before, wear on the cylinder and piston results in less power when opening the throttle and poorer engine response throughout the rev range.

This Athena cylinder kit maintains the original displacement of 449.39 cc, with a diameter of 95 mm and a compression ratio of 11.4:1. The kit includes cylinder, piston, and gasket set, making it a solid base to restore the engine to optimal condition.

Technical specifications

• Brand: Athena
• Reference: P400485100046
• Displacement: 449.39 cc
• Diameter: 95 mm
• Stroke: 63.4 mm
• Compression ratio: 11.4:1
• Weight: 1.21 kg

Compatible models

YAMAHA

• YFZ 450 R 2009-2013
• YFZ 450 X 2010-2011

Attention! The included cylinder head and base gaskets are specifically developed for Athena cylinder kits. Each time the kit is disassembled, replace the gaskets with the specific Athena set. Do not use OEM gaskets.