The secrets have been solved and the mount has been around for around a day now, and players are already taking it to the next level!
A Frighteningly Good Look
The felcycle itself is already awesome-looking, but it can always be awesomer! This is exactly what threesadpurringcats was thinking when coming up with a new, much darker, look for the bike. 
Ashen Liniment is a consumable item you can buy in Shadowlands and it makes you very shadowy. However, it also affects your mount, making Incognitro look truly menacing.
You can get the consumable from Olea Manu over in Zereth Mortis, at coordinates 37.0, 44.6 (in the top left by the lake in Exile’s Hollow). So head on over and grab some shadow dust to make your bike truly dark. And if you don’t have the felcycle yet, you can check out how to get it here. But be warned: it’s a long trip tog et it.