2016 Primavera 150cc in New York, USA

Hello, I'm a proud owner of a new Primavera and I'm having so much fun with it. I'm starting to do some performance modifications to it and have added a Malossi exhaust system. I have also changed the stock Variator 14.5g rollers with Dr. Pulley 9.5g sliders. The acceleration gains are quite impressive. However, I still cannot get higher top speeds and can only get 70mph.https://youtu.be/nzsr99Jqx5w


I'm wondering if the iten for sale here at SIP, is compatible with my Vespa.

Variator DR. PULLEY for Vespa


/GT/GT L 125-200ccm, also
for PIAGGIO Leader 125-200cc 4
-stroke AC/LC
20x15 mm, 6 rollers, 12,0


any comments?  Thanks!