Are you sure it's a"friend?" Don't let Pari catch you ridding that thing
I've never owned a scooter that ran, but they are simple machines that shouldn't need a PPI beyond: does it start easily? does it stop? Does it leak any fluids? Is the clutch slipping? (Most scooters use a centrifugal clutch and they too can slip).
And if it breaks down, you can take it apart on your kitchen counter and rebuild it with minimal parts cost
