motobecane exaust

i was fooling around with my 1970 motobecane mobylette and i went to take the end muffler off, so i did and i started it up and it had an unreal power difference, it was like there was a turbo on it, there must have been anout 2 horse power difference, then i put the muffler back on and it has no power at all, it really sux, what is wrong with the muffler, could it be pluged up badly or what i dont know?

thanx for the suggestions

Re: motobecane exaust

could be pluged up but the muffler takes a little power away. my friend had a 71 mobylette there cool.

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