Wiseco WB1039 Bottom End Gasket Kit for 2003-2009 WR250F

The Wiseco WB1039 is a complete bottom end gasket kit engineered specifically for the 2003–2009 Yamaha WR250F. Manufactured from premium materials, this kit includes all necessary gaskets, seals, and O-rings to fully seal the bottom end during a rebuild — meeting or exceeding OEM standards at every critical mating surface.

Key Features:

• Premium gasket materials — Engineered to meet or exceed OEM specifications, delivering an exceptional seal at all critical mating surfaces
• Wiseco compatibility — Sourced and validated specifically for use with Wiseco crankshafts and connecting rods for assured fitment
• Corrosion-resistant surface treatment — Helps prevent corrosion and pitting during long-term use or storage, extending the life and integrity of the assembly
• High-quality sourcing — Each component in the kit is sourced from reliable, vetted suppliers to ensure consistent quality and durability
• Complete coverage — Includes all gaskets and seals required for a thorough bottom end rebuild — no additional purchases needed

Whether you're rebuilding after high-hour use or performing preventive maintenance, the Wiseco WB1039 bottom end gasket kit ensures your engine is sealed correctly the first time. Pair with Wiseco crankshaft and connecting rod assemblies for a fully matched bottom end rebuild.