ProX 35.2319 Top End Gasket Set Yamaha YZ250 1999-2001

The ProX 35.2319 Top End Gasket Set is a comprehensive engine sealing kit engineered specifically for the Yamaha YZ250 two-stroke motocross motorcycle. Designed to simplify the top end rebuild process, this all-in-one kit supplies every gasket needed to complete the job with a single part number — eliminating the hassle of sourcing individual components.

ProX gaskets are manufactured to strict ProX specifications using high-quality materials, ensuring precise fitment and reliable sealing performance that meets or exceeds OEM standards. The use of premium materials provides exceptional heat resistance and durability under the demanding conditions of two-stroke motocross engines.

Kit Includes:

• Cylinder head gasket
• Cylinder base gasket
• Exhaust gasket
• Intake gasket
• O-rings and seals as applicable to the top end assembly

Key Features:

• Manufactured to meet or exceed OEM sealing specifications
• High-quality materials for superior heat resistance and durability
• Complete top end coverage — all necessary gaskets in one kit
• Designed to complement ProX pistons and connecting rods for a full rebuild
• Precise fitment ensures leak-free compression and optimal engine performance

Whether you're rebuilding after a season of hard riding or performing routine maintenance, the ProX 35.2319 gasket set provides the dependable sealing solution needed to restore full compression and power to your two-stroke engine.