WSM Piston Kit - Kawasaki - +.25 mm 010-821-04K

When you're pushing your Kawasaki to the limit, stock pistons simply can't keep up with the heat and stress of high-performance riding. The WSM Piston Kit delivers OEM-equivalent quality with engineered upgrades—including a specialized MOS2 coating that actively dissipates heat and reduces friction for measurable gains in power and engine longevity. This is a straightforward, bolt-in refresh that gives you reliability and performance without compromise.

Each kit contains everything needed for one cylinder, so order based on your rebuild scope. The improved E-clip design ensures secure retention, while specially hardened ring grooves resist wear under sustained load. If you're serious about durability and consistent performance, this is the right choice.

• Oversized +.25 mm 010
• Complete piston assembly
• Includes rings, pin, clips
• MOS2-coated skirts
• Heat-dispersing design
• Hardened ring grooves
• OEM-equivalent quality
• Improved E-clip design
• One kit per cylinder
• Additional rings available separately