I want to advance the timing on my blaster but im not sure by how much. I do a lot of trail riding so i am trying to get more bottom end power. I do still want to run on pump gas though if that makes a difference. I dont want to take away a lot of top end power because i heard advancing timing can do that is that true? Also i already have a 240BBK and an aftermarket pipe. will i need to change jetting if i advance the timing?