The little book they give you should explain it, remember if you start putting a pipe or cams on it you have to get one of the chip that you don't use remapped or your exhaust valves will look like a sinker in no time , what I mean is these motors need more fuel when you start modifying them , they will run lean and melt the exhaust valves , seen it ,we have the kawi program to change the mapping , so beware. GEE I wished the big K kept there 250 2t in production ,would not need all this programing stuff plus the 2t much more reliable in the engine department.