I have a 350, and if I remember correctly, my stock jet is 2 sizes larger then the 290!
Wait a minute! ...
My manual(s) tell me that the stock jet for a 290 is a #82, and the stock jet for a 350 is a #85
I don't know what their actual hole size is.
The K&N filter is basically just screen mesh with some sort of fiber attached to it,
and spraying it with K&N oil attracts and holds dust and debris until you clean it off with the K&N cleaner,
that's why it's a lifetime guarantee air filter! Use it over, and over, and over!
