Wiseco Yamaha YFZ350 Banshee 1987-2006 Piston Kit with Gaskets PK149

When you're pushing your YFZ350 Banshee to the limit, stock pistons won't cut it. The Wiseco PK149 kit delivers the durability and precision engineering you need for reliable high-performance operation, whether you're overboring for extra displacement or rebuilding after hard use. This complete solution includes everything for a proper top-end refresh—no guessing, no missing components.

Built from high-silicon aluminum alloy, these forged pistons are engineered to withstand detonation and micro-welding while maintaining tight bore sealing. The E-coated surfaces provide exceptional wear resistance, and the removal of boost ports creates a smoother, more predictable powerband across the RPM range. You get the compression and reliability that separates fast machines from ones that stay on the trailer.

• High-silicon aluminum alloy
• Forged piston construction
• E-coated surfaces
• Includes rings, wrist pins
• Includes circlips, gaskets
• Improved bore sealing
• Boost ports removed
• Fits YFZ350 Banshee 1987-2006
• Requires cylinder sleeves (sold separately)
• Professional installation recommended