The AD engine was slightly modernized version of a normal e50. It had a needle bearing Piston Pin, three shoe clutch, and the pedal sprocket with through the engine as opposed to the back wheel.
The insides of a Puch Astro-Daimler Engine
The top of the Puch AD Engine Case
Drive side of the AD Engine
Clutch side of the AD Engine
The view from behind the Puch AD Clutch Cover. The component on the left of the image is where the Pedal Sprocket installs.
The Clutch and Clutch Cover for the Puch Astro-Daimler Engine
The Interior AD Clutch Cover. The Sprokect on the right is the Pedal Gear.
The drive gear, clutch, and crank of the Puch AD Engine
The Pedal (left) and Drive (right) chains for the Puch AD