While I am not familiar with your model scooter, I have a little two stroke experience.
First off, the two stroke benefits very little ( almost nothing ) from the "big bore kit" that so many refer too, I consider that a waste of money.
The topic of port timing, and porting is too complex to discuss , they are also not for the beginner, but they are big players in increasing power.
Racing fuel, premium fuel and fuel additives are also a waste of money and will provide no increase.
The exhaust system internal shape is the single most important part of two stroke performance.
If you look at most any two stroke dirt bike you will notice the pipe ( or expansion chamber) increases in diameter ( divergence cone) there is a short length at maximum diameter, then it decreases in diameter, ( convergence cone ). This simple yet complex opposing cones is the key ingredient in two stroke power, it functions similar to a supercharger but uses sonic pulses, it helps scavenge the spent charge from the cylinder, then pushes back into the cylinder the oncoming fuel charge. You could spend and enormous amount of time researching the theory, but in short the pipe is most important.
So to sum up what I am trying to say, is that any larger amount of money spent should be directed at the exhaust system.
For smaller amounts of money spent, lighter roller weights ( inside the variator) will increase your RPM and make take offs seem faster.
Tuning the variator/secondary clutch can be time consuming, but Tiny is right, it is a player in the performance game.
There are a lot of folks who live to tune scooters and mopeds, they have taken this topic to the extreme and have vast amounts of knowledge and experience. I have noticed however these so called extreme modified bikes have very little reliability, and become a life consuming money pit.
Hopefully you can find a couple simple mods and perk up your scooter a little , then you can enjoy scootering.
I started with 50cc scooters, got a 125cc, then 150cc, then a 250. I switched from 2 stroke to four. My speeds have increased with engine size.
I am told the Suzuki Hayabusa will do 190 MPH in stock form new from the dealer, perhaps I should buy one of those.
The Thrill of Speed overcomes the fear of death.
I have a Ninja powered Grom and a GSXR 1000.