Wiseco 4665M04800 Dirt Bike Piston Kit .50mm Oversize 4-Stroke

The Wiseco 4665M04800 is a .50mm oversize forged piston designed for 4-stroke dirt bike engines. Wiseco pistons are manufactured to exacting tolerances, delivering superior strength and durability over OEM cast pistons — making them a trusted choice for both recreational riders and competitive racers.

Kit Contents:

• Forged piston (.50mm oversize)
• Piston rings (Wiseco replacement rings — only Wiseco ring sets are compatible with Wiseco pistons)
• Wrist pin
• Circlips

Key Features:

• Forged aluminum construction for maximum strength and reduced weight compared to cast alternatives
• .50mm oversize diameter for use during engine rebuilds requiring bore work
• Complete kit includes all necessary components for installation — no additional hardware required
• Manufactured to OEM-matching tolerances for proper fit and reliable sealing
• Compatible only with Wiseco replacement ring sets — use of non-Wiseco rings will void performance and fit guarantees

Whether you're rebuilding a worn top end or upgrading for added performance, the Wiseco 4665M04800 piston kit delivers the precision and reliability that Wiseco is known for across decades of powersports engine development.