Cometic B0377031F Big Bore Base Gasket for Yamaha XS650 750cc Kit

The Cometic B0377031F is a precision-engineered base gasket designed specifically for Yamaha XS650 big bore 750cc engine kits. This high-performance gasket creates a reliable seal between the cylinder and crankcase, essential for maintaining proper compression and preventing oil leaks in bored-out engines.

Key Features:

• Manufactured with multi-layer steel (MLS) construction for superior sealing
• Viton rubber coating on embossed stainless steel layers provides exceptional heat resistance
• Designed for big bore applications up to 85mm bore size (750cc displacement)
• Precision-cut to accommodate increased cylinder dimensions without gasket creep
• Proven street and track-tested durability
• Made in the USA with premium materials

Cometic gaskets utilize advanced materials and manufacturing processes to handle the extreme temperatures, pressures, and clamp loads generated by modern high-performance engines. The embossed steel construction with proprietary rubber coating ensures consistent sealing even under demanding conditions, making this the ideal choice for XS650 750 big bore builds.