You will find all info in threat titled Just bought People 250s...
Also after having many scoots over the last 14 years I would give you this advice: if you need better acceleration buy scooter with more powerful engine.
Usually when you mess with cvt components by changing only one you end with messing up something else. It requires a lot of spare parts at hand, a lot of experience and luck to make the perfect cvt setup. So called forum advice always means "changing up or down roller weights", but end results are very often disappointing...