|The following is based on Fallout Shelter and some details might contradict canon.|
“With no motorcycle, you'll surely be mistaken for a hoodlum.”— In-game description
The outfit is comprised of a matching black leather jacket and pants, worn with a white shirt. It provides the wearer with +6 Strength.
Found in lunchboxes only.
If successful attempt disassembly of outfits you can get junk:
Motorcycle jacket (1)
Free space in the storage room
Teddy bear (1)
Brahmin hide (4)