My third GY6 homemade exhaust video. This is the stock muffler with a little work. The muffler was taken apart and a bunch of large holes were drilled in the rear section, then it was put back together. I tried it with no internals, but it was way too loud. Sorry, forgot to make a video of that. The scooter is a Roketa MC-27-150 with a K&N filter, 38 pilot jet, 115 main jet, and this muffler.
GY6, scooter, scoot, 150cc, 125cc, scootdawg, 90gtvert, muffler, exhaust, performance, mod, modification, silencer, loud, free, cheap