I have something to share. I used to get 180kmh easily before. that time i used custom gapping spark plug. A normal Bosch plug which i cut off half the horizontal top part and shape the tip of it into a triangular shape. And i love the results and ive been using it for more than 6 months! Now, few weeks before today, i had to change the plug due to not working properly/misfiring (lifetime limit i guess). So i bought the Bosch super 4. It was sluggish. Then i made the gap off the four points nearer to the center core. It turns out better a bit. But still, take more time from 160 to 180 than the old custom plug. If you are using normal plug, try playing around with it. But if u already using a performance plug, i think the plug itself is already at its best.
Anyway, plug play just a minor part..
