well, don't have much options here , do we???
top speed of CG125/GS150, i have checked with my mobile GPS and it is around 105Km/h at best, which on meter shows around 115Km/h .
I think piaggio also shouldn't have any problem doing true 100Km/h(GPS), as i touched 90Km/h(GPS) on my Junoon.
So basically, i wouldn't worry about top speed when choosing between 125cc/150cc bikes as they have almost same top speed. So if you like piaggio , just get it and enjoy.
If you want to do 120Km/h , then no local bike can do it, its just too much speed. You better look at 250cc or above for that.
how much RPM bike is achieving in top gear now??? and how much it used to be before modifications??
it would be great if you can do a GPS test of your piaggio and share with us.