Yes u need to rejet with any engine mod...
LRD, I'm confused on how much I have to measure the degree. I guess 4 degrees is like what a quarter of an inch? Does it HAVE to be exact 4 degree or can I GUESS its like 4? Lol sorry for making an ass outta myself
4 degrees is 4 degrees.....doesn't matter how small or large the circle is. The circumference size will change, but the degrees remain the same. YFS stated in his 1st post that 4 degrees is "3mm left on the screw holes and the plate will turn clockwise". I find using degrees with a protractor to be more accurate personally. You can just go with 3mm left if that's easier for you though.