What moped do you have? I've got one as well, pretty much everyone in sweden does.
Over here you're allowed to ride them from the age of 15 with a license.
Maximum legal speed for the class II mopeds is 30km/h, and for the class I modeps, the limit is 45km/h, nobody gives a shit about this (expept parents and cops), so every moped is tuned, often with exhaust systems, or cylinders.
Mine is a Honda MT5 (it's an old class II moped), with a 5.5hp cylinder, 16.5mm carb, some exhaust system, and 16/45 gears, does about 60-70km/h, it revs a lot though :/
Just an LML Vespa. minimum riding age is 16. there is no class system but if you have a B license which is almost basically the moped license the cops can't issuea fine higher than RM200(USD $65)