INSTALLATION: Drag n' drop "conditionalanims.meta" to "mods/update/update.rpf/common/data/ai"
If this doesn't work, drag and drop it to "mods/common.rpf/common/data/ai" aswell.

To see if it works, spawn a bike with a trainer or find one, remain idle for a couple of secs and you'll see the idle anims play.

Vehicles I've seen work with this are: Sports bikes, choppers, both normal and long handlebars, dirt bikes, quad bikes and even mopeds aka Faggio!

Anyways, if you like this mod. Please, give this 5 stars. I'll be very much appreciated!
-Eclipse