Wiseco Piston Kit Yamaha YFZ450R 2004-2009 PK1064

Your YFZ450R's engine performance is only as strong as its internals. When you're pushing hard on the track or trail, factory pistons can't handle sustained high RPMs, extreme heat, and aggressive tuning—which is where the Wiseco Piston Kit steps in. This complete top-end solution delivers the strength, precision, and thermal stability serious riders demand.

The kit features high-silicone forged aluminum construction, engineered to withstand extreme operating temperatures while resisting thermal expansion that can cause detonation and power loss. Wiseco's proprietary ring design creates a superior seal that rivals can't match—and for good reason, these rings are engineered exclusively for Wiseco pistons and won't interchange with competitors' products.

Everything you need comes in one box: forged pistons, premium compression rings, wrist pins, circlips, and a top-end gasket set. Installation is straightforward for experienced builders, though professional machine work is recommended for proper honing and clearance verification.

• Wiseco High-Performance Piston Kit
• High-silicone forged aluminum construction
• Yamaha YFZ450R 2004-2009 fitment
• Complete kit: pistons, rings, pins, circlips, gaskets
• Superior thermal stability
• Proprietary Wiseco ring design
• MPN: SK1094
• Bolt-on installation (machine work recommended)
• Pair with Wiseco rings for optimal results