Wiseco Pistons 448M05550 Forged Piston Kit Standard Bore - 2-Stroke 55.50mm

The Wiseco 448M05550 is a 2-Stroke Forged Series Piston Kit featuring a standard 55.50mm bore. Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, this piston kit is purpose-built for demanding dirt bike and motocross applications where strength, reliability, and consistent performance are critical.

Wiseco's legacy in 2-stroke piston manufacturing spans over 80 years, and this kit reflects decades of design refinement and real-world racing experience. Each piston is dedicated-forged from high-silicon aluminum alloy, delivering an optimized strength-to-weight ratio that outperforms cast alternatives.

Key Features:

• Forged high-silicon aluminum alloy construction for superior tensile strength and long service life
• Dedicated forging design with optimized piston skirt geometry for maximum horsepower and torque output
• Engineered, forged, and machined in the USA (Mentor, OH)
• Designed specifically for each individual 2-stroke powersports engine — not a universal fit
• Lightening operations provide an ideal strength-to-weight ratio without sacrificing durability
• Kit includes: one forged piston, two 2185CD piston rings, and two CW14 circlips
• Wrist pin S394 sold separately
• Standard bore size: 55.50mm

OEM Cross-Reference Part Numbers:

• Standard Piston: 13101-KA3-700, 13101-KA3-740, 13101-KA3-710
• Oversize 0.25mm Piston: 13102-KA3-700, 13102-KA3-740
• Standard Ring Set: 13011-466-305

Whether you're rebuilding for trail riding or preparing for competition, the Wiseco 448M05550 piston kit delivers the proven performance and dependability that Wiseco has been known for since 1941.