Isn't your scooter still under warranty?
Don't know that anyone here has modified the new fuel injected Like 50.
I would not go cutting anything under your seat and/or trying to alter the fuel delivery to your injector by turning screws on your throttle body!
Maybe a modification in the CVT will get you a small handfull more MPH. Washer, boss, roller weights, etc? but wouldn't mess with the EFI.
Stig