Wiseco Pistons 4785M09500 Forged Piston Kit Bore Compression - 95mm 12.5 1

The Wiseco 4785M09500 is a high-performance 4-stroke forged piston kit with a 95.00mm bore and 12.5:1 compression ratio, engineered specifically for Yamaha YZ450F and WR450F dirt bike applications. This piston is engineered, forged, and machined in the USA in Mentor, OH, delivering the strength and precision that serious riders demand.

Key Features:

• Forged from aerospace-grade aluminum using a process that compresses the material's molecules, increasing density and aligning grain flow for superior strength, impact resistance, and fatigue resistance
• ArmorGlide skirt coating reduces friction and provides scuff resistance
• Diamond turned finish from CNC computer controlled turning centers guarantees a perfect finish with no size variation
• Optimized dome design improves flame travel for better combustion efficiency
• Horizontal slot pin oiling reduces friction and scuff resistance
• Pressure seal groove design ensures maximum ring seal

Complete Kit Includes:

• Forged aluminum piston
• High-quality piston rings, wrist pin, and circlips
• Chrome plated piston pin

Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength, proven at every level of riding. This standard bore replacement piston delivers reliable power for both high-performance racing and recreational riding applications.

Note: Only Wiseco replacement ring sets can be used on Wiseco pistons for proper fit and performance.