So with the coming of the Shattering, everyone on my server horde side has been raising their goblin rep to get the goblin trikes. Now Orgrimmar is covered in Trikes at peak hours, but they sounded so weak and boring. So I thought to do something about it.
This file changes the trike's idle sound and running sound. Check it out! Just drag the Sound folder from this RAR into your Data folder.
World of Warcraft/Data/Sound/Creature/GoblinTrike/(sounds are here)
Gobllin Trike Sounds