[pocketbike401]

With a 12 hp 50cc W/C gearing 7-68 whats the max speed?
4.5 polini motor A/C (says its 70km/h With Avery good punch off the line)

Which one would you say is a better buy?

 

[N!pples]

What the 50cc motor? A china rep? The 4.2 in the polini 4.2 is the supposed HP of that engine stock.. They take some mods to make faster.. You might hit 40 if you weigh 100 lbs..

The 50cc water cooled? Ummmm Id do the 50 if so... If the polini was a 6.2 case then probably the polini... lol