Yamaha Xmax 300 Gasket Head Cover (B74-E1193-00)

The Yamaha XMAX 300 Gasket Head Cover (B74‑E1193‑00) is a precisely formed sealing component used between the cylinder head cover and the engine block on the XMAX 300. Its purpose is to create a tight, leak‑proof seal that prevents engine oil from escaping around the head cover area while keeping contaminants out of the engine interior.

Made to Yamaha’s original specifications, this gasket is constructed from a material designed to withstand repeated heat cycles, vibration, and the pressures of normal engine operation. Over time, the original gasket can harden, crack, or compress due to heat and engine movement, which may lead to oil seepage or minor leaks. Installing this genuine‑style gasket restores the correct seal, helping maintain clean engine surfaces, proper oil retention, and consistent lubrication.

A secure head cover seal contributes to engine longevity, reduces mess and oil loss, and helps ensure that the valve train and other internal components remain properly lubricated and protected.