What goes here? 99 yz400

ImageUploadedByThumper Talk1403197409.949181.jpg

So why is there a hole in the side of my engine

It's a drain for the spark plug hole in the head so water, dirt, ect. doesn't collect and cause ignition problems.

Hmm so I didn't need to get on my hands and knees to suck water out of it after I washed my bike? Haha I feel pretty stupid

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