125cc Honda Grom DHM piston TB cam Mild port job ARacer ecu tuned by yours truly 15.8hp. Fasted mph so far is 89mph GPS. This was around 80mph cruising around not fully tucked.
Why did you stick with the stock bore? This is an awesome build. I want a 90mph Grom haha. What sprockets are you running? This bike sounds awesome!! Stock exhaust?
I wanted to see how much power and how fast I could go with the stock size engine. The bike had a Yoshi exhaust, but I modded it by cutting out the center S section and made it more of a straight pipe to the muffler. I believe I was down 1 tooth in the rear and was revving to 12k
