Hi every one, i think on this site its a lot of misunderstandings,like about the carburetors. By changing the jets to bigger you change the air and fuel mix,so you get more gasoline to the combustion chamber,ok do a easy experiments at home(OUTDOOR) Take one glass and fill up with gasoline and put fire on it, yes just a little flame will come like too big jets also can cause(Too rich mix), and then you pooring some gasoline to the ground,now you have much air and little gasoline,yes it will almost explode(Poor mix),so dont walk around and think that the bigger the jets are the more power you get, you also need more air to maintain the right mixture.