Hi Guys So I just changed oil and filter of my ya aha MT09. I have clocked 22000km so far. The manual says to replace the spark plugs at 20000km. So I have a question that I would like to get your guys opinion on. Any help is greatly appreciated. Should I just go get the oem plugs from the dealer [ which I believe is an NGK 2308 CPR9EA-9 ] or should I shop around for something else. Like ngk iridioms, or densos or likewise?