The Zuma 4T 70cc kit is also for the Vino 4T and C3. The Zuma 4T is the only one that has an exhaust made for it from Two Bros.
Yamaha Zuma Vino 4T Cylinder Kit with Three-Valve Head for Yamaha Giggle C3 Vox.
47mm 70cc Complete Top End Upgrade for a much faster and more torque for bottom end.
This is a 70cc kit unlike the Malossi and Polini Kits which are 44mm at 60cc. Although the Malossi kit does come with a CDI or brian to up the Revs.
These kits for the Yamaha Zuma Four Stroke Liquid Cooled engine are brand new addition.
There are several distributors that have offered the kits to Scootertronics so time will tell which ones do really well. Consider that some advertise the 44mm kts as 70cc, Scootertronics will get this worked out.