Wiseco Pistons 4906M09800 Forged Piston Kit for Yamaha YFZ450R 98mm Standard Bore 12.5:1

The Wiseco 4906M09800 is a high-performance forged piston kit designed specifically for the Yamaha YFZ450R ATV. This standard bore (98mm) piston delivers a 12.5:1 compression ratio for increased power and throttle response, making it ideal for both racing applications and performance-minded recreational riders.

Premium Forged Construction:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength and durability
• Reduced weight compared to cast pistons improves engine response
• Enhanced heat transfer properties prevent detonation and extend piston life
• Diamond-turned CNC finish ensures perfect fitment with zero size variation

Complete Kit Includes:

• Forged aluminum piston
• Premium piston rings
• Wrist pin
• Circlips

Wiseco pistons are manufactured using state-of-the-art CNC machining centers and are compatible with all modern cylinder bore compositions including cast iron, chrome, nikasil, and boron composite. Each piston is precision-engineered to OEM specifications while delivering the performance advantages that have made Wiseco the choice of professional racers and enthusiasts worldwide.