This is a paid asset, but now you can download Motorbikes Package animated for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Motorbikes Package animated v1.121
Motorbikes 3D collection.
Optimized for real-time engines and suitable for high quality renders.
2 Bike meshes (+2 LODs):
Chopper
Sport bike
Each bike use 5 different texture skins.
Each biker has 10 own different texture skins.
Animated versions with rigged bikers are included.
Static versions with appropriate hierarchy parts.
1804 triangles tall guy + 4960 CBR sportbike.
1686 triangles fat guy + 5901 Harley chopper.
28 cool driving and trick stunts animations.