..lol..assuming that it is an A50, i'd say that yup, using a high flow filter will give you a lil more pep, and a better sound...did mine..however, the biggest two changes for quicker take-off will be your roller weights and some stiffer than stock fly clutch springs...I'm runing 4.7 gram (stock is 6 gr and i ran 5.5 gr for a long time) rollers in a Malossi variator with a white "1000" Malossi main torque drive spring, and red Leo Vince +50 fly clutch springs...
..I'd agree that with a de-restricted exhaust, you probably do need to go with the filter, and you will need to up-size your jets...
..how did you derestrict the exhaust??
..I'd give you some starting points for jet sizes, but my scoot seems to be a bastard red-headed mongoloid stepchild...
peace