Spotted this on Pinterest.
Apparently Machine56 is an indonesian artist who runs a small online store which sells anime-scifi-biker themed products.
He produces graphics in addition to motorcycle helmets and attire.
Interesting elements and not those you usually see in vector packs.
From their site:
old collections of Machine56 Vector object, clientless and free royalty vector objects, no credits needed, use it for both commercial and non commercial purpose.
packed in secure zip for all vector based program format.