From my memory, a big bore (70cc) cylinder and another (12.000 RPM) CDI will be needed...
Furthermore, it is important that the standard limiters are removed from the engine and the new exhaust!
Please note that you also need a larger carburetor than the stock one....
See also the attached file.
Don't know whether there are still active websites for the 2-stroke Dealim.
There used to be a large market in the USA for the Korean brand of (moped) scooter.