Bike design research information

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chinawanbang.en.alibaba.com/product/50041647/50188916/Electric_Bike/Gasoline_Bicycle.html

somebody was lookig for bike design suggestions
the link above takes you to a 30cc Petrol driven
bicycle, very much like the old style French Isolex
Soler Velomoteur machines that were legal over the age of 13yrs and no licence required.

They are so much like the electric bicycles now commonly sold in the UK licence/road tax free
that one wonders whether any officious would actually notice that it is a petrol driven machine.
From the apperance certainly not.... from the noise perhaps..... Not me , Sir!

The above link takes a while since it comes from China. I shall check on the price.