WR450 Head Plug

Does anyone know where I can get a replacement for the plug that is in the forward right side of the cylinder head. Mine popped out and and I blew about 1/4 of my oil before I could get it back to base. Its not listed in the manual parts or on Yamaha's parts list.

the plug is for the hole that used to be where the decompression mechanism wnt into the head,,,mine fell out,went to yamaha and got a revised rubber/steel plug,,,they will find it in the cam section,,oddly enough,,i put some supper glue onit,,been ther for 3years now,,i bought 2,,just to have an extra,,,good luck

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