Bengt Ek's Muscle Machine

I know Bengt Ek for his range of clocks and kitchen utensils and I was surprised to find out from his blog that he designed this kit for Muscle Machine in the 70's. There's a blue CB750 Muscle Machine currently for sale in the Norwegian classifieds with Henry Abe star mag wheels.
Bengt Ek Design
Finn.no
Henry Abe