It's not baffles causing our power restriction, it's supposedly a catalytic converter. I haven't verified yet if it's actually a cat pipe, but there appears to be a large diameter catalytic converter near the back end of the header before it connects to the muffler mid pipe.There has to be baffles in the stock muffler that can be knocked out. People do it sll the time on other bikes
not impressed with how it sounds, the grom really does sound better with the stock exhaust on and even with an aftermarket exhaustToo loud. I did it and didn't like it.
Honda Grom with No exhaust, straight pipe. - YouTube