I think its profile, i.e. is it an evolution or revolution. For example. CBR1000RR undersea is different to the latest underslung exhaust. GSXR has been the same since the K1 R1 underseat, then bigbang, then new one... Get the gist
where is that? It's a jap bike not brit, so it's not the Thistlegorn. Is someone dropping old CB900s into the sea for coral reefs?