Yamaha Xmax 300 Gasket Breather Cover (B74-E1169-00)

The Yamaha XMAX 300 Gasket Breather Cover (B74‑E1169‑00) is a precision‑engineered sealing component designed to fit between the breather cover and the engine casing on the XMAX 300. This breather cover gasket creates a tight, leak‑proof seal that prevents engine oil, crankcase vapors, and contaminants from escaping or entering where they shouldn’t.

Over time, the original gasket can harden, crack, or compress due to heat cycles, vibration, and age, leading to oil seepage or loss of proper crankcase ventilation. Installing this genuine‑style breather cover gasket restores the correct seal, supporting efficient crankcase breathing and maintaining oil integrity. A proper seal helps sustain engine performance, reduces unwanted leaks, and protects internals from dirt and moisture.

Made to meet Yamaha’s exact specifications for material and dimension, this gasket is essential whenever the breather cover is removed during maintenance, service or repair.