Wiseco 546M08900 Pro-Lite Forged Piston Kit Bore - 2-Stroke 89.00mm

The Wiseco 546M08900 Pro-Lite 2-Stroke Piston Kit features an 89.00mm bore and is engineered for Yamaha YZ490 and WR500 applications. As the forged 2-stroke piston that started it all, the Pro-Lite series represents decades of Wiseco manufacturing expertise — delivering a winning combination of strength, reliability, and performance for all-purpose 2-stroke riding.

Key Features:

• Forged aluminum construction — engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH
• Pro-Lite dedicated forging design optimizes the strength-to-weight ratio for improved throttle response
• Extra lightening operations enhance throttle response and overall engine feel
• Diamond-turned CNC finish ensures a precise bore size with zero size variation
• Compatible with all major cylinder bore types — cast iron, chrome, Nikasil, and boron composite cylinders
• Oversize options available to extend the service life of cast iron lined cylinders; chrome, Nikasil, and boron composite cylinders can be re-sleeved to accept Wiseco oversizes

Kit Includes:

• Forged piston
• Piston rings
• Wrist pin
• Circlips

Wiseco's Pro-Lite pistons are the go-to choice for recreational riders and performance enthusiasts alike, offering proven reliability from the track to the trail. Built to the tightest tolerances using state-of-the-art CNC manufacturing, this piston kit is a direct upgrade that restores or improves upon OEM performance standards.