Mine now cruises at around 42 on a flat and can reach over 50 on most hills, I'm just 16 and learnt everything from reading, watching YouTube videos, common sense and trial and error (annoyingly) so everything here is reasonably achieved, here is list of everything I've done so far:
Put in 5g rollers
Adjusted the valves of the engine to 0.05 mm
Taken off air box and put on sports air filter
Changed the main jet on the carb to #90
And just for looks, fun and security:
Replaced two small lights with blue led's
Changed horn for low note car horn
Installed alarm system with key fob activator
Gave the moped a sticker job
Too further improve the performance I am soon to:
Change the clutch springs to stiffer ones for improved acceleration
Remove emission refugees and block pipes to increase power
Install more lighting
Just ask questions
Sam
June 2011