Anyone have the expansion chamber with muffler?

GoldenMotor.com

Ichigo

New Member
Jun 18, 2017
12
0
1
52
My 66cc motor won't hardly run with the stock muffler, when I take it off it runs like a champ. Anyone have bikeberrys expansion chamber with muffler? What do yo think of it? How much louder is a regular expansion chamber?