Western Motorcycle Company (Western) is primarily based on Harley-Davidson as Western manufactures chopper and cruiser style bikes, many of which take Harley design cues, as well as having branding resembling Harley-Davidson's iconic logo. Western also takes design cues from other prominent motorcycle companies such as West Coast Choppers and, more recently, Indian Motorcycle. It is unknown what, if any, relationship it has to the aircraft manufacturer Western Company.
- Despite the Revenant bearing a WMC badge, Billy Grey (the bike's owner) mentions that the bike was built by Johnny Klebitz and Angus Martin. This may hint that Billy's particular Revenant is a heavily rebuilt/customized version.
- Starting with the introduction of the Sovereign, new badging has been introduced that much closer resembles the actual Harley Davidson badging.
- One of the three police scanner audio files for WMC refer to them as "Motorcycle W Company", getting the first and second words the wrong way round. This mistake is present even in Grand Theft Auto IV.