Ive asked this before and got good answers but I want to add a little more to my questions. So I'm going to rejet my carb because I took my air box cover off, and winter is here and the winter air is more dense. I'm getting a 270 main jet (engine is completely stock, just have no air box cover). Is that all I will need? Will I need to do my pilot jet or anything else? I know I should probably do some plug chops but ive never done them before and im not really sure what I should look for. Anything is helpful to me. Thanks.