Push bike with a petrol engine added.

[Kestevan]

We've got more of a problem with youths on unregistered MX bikes tearing about popping wheelies. I'm just waiting for the day one of them wobbles straight into the front of a truck.

In that case, think of the truck as chlorine in the gene pool....

 

[RichardB]

Now some one has spent a lot of time on that, Looks a bit like a lawnmower engine?

I think that's because it is a lawnmower engine! Actually, I am quite taken with that. I can see my Raleigh Amazon zooming into graceful old age with one of those aboard.