Yamaha Xmax 300 Gasket Cylinder Head (B74-E1351-00)

The Yamaha XMAX 300 Cylinder Head Gasket (B74‑E1351‑00) is a precision‑made sealing component placed between the cylinder block and the cylinder head in the XMAX 300’s engine. Its primary role is to create a leak‑proof seal for the combustion chamber, coolant passages, and oil galleries. This gasket must withstand intense heat, high pressure, and constant vibration while maintaining integrity between the engine block and head.

Over time, repeated thermal cycles and engine stress can cause the original gasket to deteriorate, leading to loss of compression, coolant or oil leaks, overheating, or reduced performance. Replacing a worn or compromised head gasket with this genuine‑style part restores proper sealing, preserves engine compression, and ensures correct separation of oil and coolant paths. Using the correct cylinder head gasket is essential for reliable engine operation, optimal power delivery, and long life of internal components.