Hi, goodtech here I tried the side gaping on the ngk's(dpr8ea-9)I found that my bike starts somewhat easier,but I did not found that the performance increced any, if any is in the upper rpm's but it seem's that five'o is lercking around the corner everytime I get on it.The gas mileage is the same as I ride acoringly,(40 mpg)the bigest thing I notest the bike is smother at idel and at stedy speeds
