On a related note, back in the late 70's
I owned a brand new 50cc Yamaha FS1E motorbike. The exhaust would require cleaning every 500 miles or so but it was pretty easy since you simply removed the baffle pipe from the muffler and cleaned it out. I wonder why more modern Yamaha vehicles never followed that idea ? BBQing the whole pipe looks like fun but it would be one heck of a lot simpler with a removable baffle like that little bike had.
Chris.