Mi amigo Howie.....No helmet law, no speed law, no noise law......here is the lawless state !!!
And besides of that: RIDING 12 MONTHS 
Actually Florida has long since had statutes dealing with motorcycle mufflers and noise. They just haven't been enforced. Well, actually they have but only selectively. Last year a community right down the road was ticketing riders for loud pipes--but that was because the idiots were riding past a senior high-rise building and using it as a sound reflector....revving up their bikes to listen to the echo. Big fun for them and completely annoying to the old folks. Got all riders some bad press for a month.
http://home.ama-cycle.org/amaccess/laws/result.asp?state=FL[edit] Hmmmm. Might be some wiggle room. Depends on the exact definition of "excessive or unusual noise." The FL statues from the ".gov" website aren't quite so specific:
The 2008 Florida Statutes
Title XXIII
MOTOR VEHICLES Chapter 316
STATE UNIFORM TRAFFIC CONTROL View Entire Chapter
316.272 Exhaust systems, prevention of noise.--
(1) Every motor vehicle shall at all times be equipped with an exhaust system in good working order and in constant operation, including muffler, manifold pipe, and tailpiping to prevent excessive or unusual noise. In no event shall an exhaust system allow noise at a level which exceeds a maximum decibel level to be established by regulation of the Department of Environmental Protection as provided in s. 403.061(11) in cooperation with the Department of Highway Safety and Motor Vehicles. No person shall use a muffler cutout, bypass or similar device upon a vehicle on a highway.
(2) The engine and power mechanism of every motor vehicle shall be so equipped and adjusted as to prevent the escape of excessive fumes or smoke.
(3) A violation of this section is a noncriminal traffic infraction, punishable as a nonmoving violation as provided in chapter 318.