To me the tank looks like S65/90, the motor could be the same or a 50.
The carb is in a strange position, pobably to keep the height down, must have a strange manifold.
![Grin ;D](http://forums.sohc4.net/Smileys/default/grin.gif)
I would say it is a childs sprint/drag bike but what the heck is that big leaver for ?
Sam.