True that.

Hello, my Honda CB - 160 had a of single sided upswept pipes from Webco In. On the end I had mounted two one-foot-long short reverse cone megaphones. These megaphones had a removable baffle. The baffle was recessed but had a lip to cove completely the hole in the megaphone. This baffle had roughly a dozen 1/4-inch holes spaced about and drilled into the baffle. Through the center of the baffle passed a 1/2-inch-long bolt about 5/16ths, that had a nut threaded onto it. soldered or brazed to this bolt was a loop of steel wire that was rigid and spring like tempered. This loop of steel was not circular but flattened like a very severe flat oval. This spring steel flattened oval loop (more like a racetrack than egg) was long enough to be inserted into the reverse cone of the megaphone. After inserting it the central bolt could be tightened and the tension would hold the baffle in place until it was decided it needed removal. This was an elegant solution to mount a removable baffle. The seven years that I had that Honda the baffle never fell out. " Hey! "

P'S. I never could ride the bike and stare at the baffles, but I always suspected that with hard charging throttle usage that this spring-loaded baffle would give a little bit and fractionally open the reverse cone just a little bit. Anyways, the bike could be driven quietly until the throttle was seriously opened.