press: T1,T2,T3, its up to you, after that press ''Tracklist'', and select (Circuit, Sprint, w/e u want), then look at the names of the tracks and the level u have to be to get the gear ,
but it doesnt mean you will get PARTS in all the matches, its all about luck.
I TEST IT AND I GOT 4 PARTS AROUND 20 MINS PLAYING
HERES THE LINK:

DONT FORGET TO PRESS THANKS IF I HELPED






