oil leak from open port right above exhaust on cylinder

2004 Yamaha WR450


Does anyone know what is supposed to cover the port shown in my attached picture?


That's where the decompression mechanism is supposed to be installed. You can order a head plug from eBay, or there is something at an auto parts store you can use. I don't recall what they're called. Will look and let you know.


18mm freeze plug at auto parts store.

Edited by 0bigsilver6

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