..wow, where were all these low-cost scooters when I was buying mine...
..dude, Welcome to the Forum! and congrats on your steal!!!
..tell y' what has worked for me on my 08...
..4.7 gram Leo Vince rollers in a Malossi Multivar variator..
..white Malossi 1000 main torque drive spring..
..blue +15% Leo Vince fly clutch springs..
..K&N air filter which facilitated a 1.02 mm main carburetor jet..(your scoot's jet may differ)
..religiously adjust my valve clearance to .04mm spec...
..change my oil at about half the recommended intervals...
..Avon Viper Stryke tires.. (tires and air pressure make a difference)
..all that for less than $300.00...
..this got me in the ballpark of 50mph...
..however, these stock A50s will forever be at the mercy of big hills and strong headwinds...so expect to drop to 35-40 mph up a decent hill, and you're gonna lose speed when the wind's not in your favor...
..I weigh @ 220 lbs, but what I've found is that top speed is as much about drag reduction as it is weight..
peace