There are plenty of pics of Honda Dax mopeds on Dutch fourstroke sites, my site http://drive.to/ivo215 has two, one original and one completely choppered up custom, click on the Honda SS50 on the main page for the photo's. You can acces a lot of other Dutch fourstroke sites through the 4-stroke webring link at the bottom of the main page of my site.
The reason why some people put a CD engine on a Dax is because it has a manually operated clutch instead of an automatic and it has four gears instead of three. All the engines of the Honda Dax, Novio, Chally, Cub, CD50 and SS50 are interchangeable.
I used to have a modified Cub engine ahnging under my SS50, the clutch, gearbox, cilinderhead and carburettor were replaced by SS50 parts. Now I have a modified SS50 engine under my SS50, the crankshaft and flywheel have been replaced by racingparts and the carburettor by a 16mm. Keihin imitation. The beauty about Honda fourstrokes is that every part is interchangable and therefore no fourstroke is the same.