Best Sprocket Combo for X-19

i want better acceleration, but really dont want to loose any top speed, if possible gain top speed also. if this helps bike is stock. thanks

try 17/28
better1-2 gear
slower to rev 3-4 initially
higher top speed 10mph at least

thanks. is that 10 mph with that being the only mod?

ya pretty much
at high speed a breeze will slow you down tho till you build or replace the motor