I got my new bike on wednesday had a couple questions. 1. Do you recomend buying an aftermarket oil filter or washing the stock one? 2. If you wash it what do you wash it with? Water and gas both dont seem right. I cant get a yz needle til the end of the month. (backordered) If I rip the lid off of the airbox will I be too lean with the wr needle raised?? Im still wr timed and have a yz muffler.