The bushes start to flower, the cat has been young and it is nice weather to do another afternoon tour on the classic motorcycle.
At least if those kittens from that moment come to realize that a classic motorcycle is not a cat toy, but a potential killer.
Oh yeah; in terms of cat love, consider what your reaction is if you discover after the winter, which is undoubtedly still to come, that your cat or that of the neighbors have used your buddy seat as a scratching post.
So lay an old, sturdy blanket over your motorcycle. Or head a real motorcycle cover