Re: Enclosing Air Cooled Engine, 125cc and single track trailer
Those are a lot of different questions and you'd be better off using the search function. As far as enclosing an engine, you can do it but you need to make air ducts that sufficiently draw and accelerate the air to the head. Look up race car body scoops and vents, also airplane aerodynamics. All of that will apply.
I don't always listen to Alice in Chains..... but when I do, SO DO THE NEIGHBORS