Welcome to the forum!
You could read back here through the many similar requests for speed from the 50cc LIKEs, or any 4t 50's.
Generally speaking the 2t was of course much much easier to mod for more speed.
The 4t is notoriously slow....full stop.
We did have a member who, after too many DUI's, was down to commuting on a 50 LIKE - he did many things to the bike at saw an "honest GPS 60mph" out of it....he claimed.
In fairly short order he blew it up and/or crashed, I forget.
Hopefully some good tips will come your way - but in the mean time - there are our archived postings from 50 owners who want more than 29>33mph from their 4t/50.
Stig