I could be wrong but I was basing it upon some of the custom cubs I've seen on the web. The two holes in front of the shock are showing up on these. Here's another example;
http://www.bikeexif.com/honda-cub-surfboard
But even that one is a Chinese clone.
Of course, Honda might have used the frame elsewhere as I've seen Cubs that had different frames.
BTW, Boom offers an example of the bike in the first post. It doesn't have as many spokes and has a different color scheme. It came up here;
http://www.chinariders.net/showthrea...highlight=cl90