ok guys i took my 160 for i ride today with no muffler just out of curiosity, OMFG the sound was f'ing INSANE, i was on it and it sounded like a v8 and no matter how many people discredit me for this is was faster and more aggressive, i now you'll say it isn't but i was there and then my mate rode it and i heard it from the outside, #@$# it was like a storm, im selling it but now it makes me wanna keep it, btw i didnt do this near people so dont give me shit, oh plus there were the occasional pops from the exhaust and when you let go of the throttle it makes this awesome burble noise, today was FUN!!