I had a Honda 150 4stroke many years ago and it sounded like shit with the baffels in so being the tit that I am I took the baffels out and it sounded great, trouble was that the back pressure was not enough and the engine ran really hot, after about 3 weeks the internals let go and I spent the next week and the next months wages putting it back together, packing does reduce the sound making it less harsh but you have to make sure the jetting is altered to take into account the loss of pressure, just my opinion you understand as others are much more up to date with more modern machines and their foibles but my advice is, if it came with it then put it back how it should be.