Moped Army

I have a couple questions. First, i want to know if it is bad running the moped without the exhaust on?(Will it clean anything out?)

2. i have a 2003 panther and after i want to know why it shakes so much more than for example a tomos. Is there any way to stop some of the shaking? After going 35+ it seems as if i should slow down because it don't really know if it is just my moped or if i should slow down lol.

Last question is sort of hard to explain. But, it is very weird when there is hardly no wind it will only go like 33 or like 4 mph wing blowing in my face but when it is blowing in my back it seems like im going like 10 mph faster. Like just 2mphwind seems to increase my speed greatly. i have no clue why?

any performance tips that WON'T hurt my moped? Thanks