I know with cars that changing a muffler will do little to the overall running of the car, Eg: changing to a canon type muffler will change the way your exhaust sounds but does little for performance if the rest of the system is left stock. On a motorbike is the same true? Im not looking for a performance gain at all, thats counter-productive on a 250. What i am looking for is a noise level gain. My car runs a straight pipe, no muff. Looks like its got a muff, but it doesnt, and it sounds fantastic. If i were to do the same on my bike, seeing that its not fuel injected, would this adversely affect the fuel system (carbies). Would i need to do anything if this was the only modification? I know very little about carb'd engines and imagine that changing something that does not necessarily change the restriction or flow of spent gas from the exhaust would do nothing to the performance of the engine. Am i correct? Thanks, Adge.