yasuni r or z on stock 50cc aerox - help

[aeroxrokt]

Hi everyone, im not sure what should i get to my aerox, im interested in speed aswell in noise(i want it to sound loud), what should i get? thanks in advance
p.s: larger chamber in yasuni r would do more noise or the oposite?

 

[melf #50]

If you want sound , buy a Gianelli or Laser , Tecnigas etc. Yasuni R has a more civilized sound wich a prefer cause more noise doesn't give you more speed , but is does make you look like a dork ..

The R responds very well on a stock Aerox , easy in use and good quality! I suggest you also buy a good variator with some rollers and return springs so you can adjust the variator very well.