Piston/Ring Kit

KOSO Piston & Ring Kit — Precision Engine Rebuild Parts

Upgrade your engine with the KOSO Piston & Ring Kit, engineered for reliable performance, tight tolerances, and long-lasting durability. Ideal for small engines, scooters, mopeds, ATVs, and performance applications, this kit delivers improved compression and reduced blow-by for smoother throttle response.

• High-quality materials: Forged/aluminum piston and hardened rings for wear resistance.
• Precision fit: Machined to OEM specifications for easy installation and consistent tolerances.
• Complete kit: Includes piston, piston rings, wrist pin, and circlips — everything needed for a standard rebuild.
• Improved performance: Better sealing and heat management for efficient combustion and longer engine life.
• Wide compatibility: Replacement for many popular small-displacement engines — check fitment before purchasing.

Trust KOSO's reputation for performance parts when you need dependable engine components. Shop now to restore compression, reduce oil consumption, and get your vehicle running like new.