Wiseco K1040 Forged Piston Kit Kawasaki ZX1000 75.5mm +1.5mm Oversize 11:1 CR

The Wiseco K1040 is a complete forged piston kit engineered for the Kawasaki ZX1000, featuring a 75.5mm bore diameter (+1.5mm oversize), 11.0:1 compression ratio, and designed for the 1039cc engine displacement. Each kit includes pistons, piston rings, wrist pins, and circlips — everything needed for a complete top-end rebuild.

Key Features:

• Forged High-Silicon Aluminum Construction: Wiseco pistons are forged from high-silicon, low-expansion aluminum alloy, delivering superior tensile strength, reduced reciprocating weight, improved heat transfer, and extended service life compared to OEM cast pistons
• CNC Diamond-Turned Finish: Each piston is precision-machined on computer-controlled turning centers for a consistent, accurate finish with zero size variation, ensuring proper fit and seal
• Compatible with All Cylinder Bore Types: Designed to install confidently in cast iron, chrome, Nikasil, and boron composite cylinder bore compositions without modification
• Oversize Rebuild Solution: The +1.5mm oversize bore is ideal for restoring worn cast iron lined cylinders to factory tolerances; chrome, Nikasil, and boron composite cylinders can be re-sleeved to accept this oversize
• Engineered and Machined in the USA: Manufactured at Wiseco's facility in Mentor, OH with dedicated forgings for this specific application, optimizing the strength-to-weight ratio
• Complete Kit: Includes high-quality piston rings, wrist pin(s), and circlips — ready to install

The Wiseco K1040 piston kit is built for both the performance-minded rider and the enthusiast performing a high-quality engine rebuild, delivering the precision and durability that Wiseco forged pistons are known for.