[HELP] Extra parts

Hello everyone I tried to solve this, but I do not think anything related, I was wondering if it is possible to generate a bike with the extra parts already added, what happens is that I have a bike that has yft files divided one of them is the enduro_ex1.yft that only appears in the vehicle when I apply it in the Los Santos Custom, however what I wanted is already to appear with that exhaust installed while spawning the vehicle

Sorry about my English