Only way to do it "on the cheap," is to strip weight off the bike. Adding after-market exhause and/or intake can give more power as well, but these aren't cheap.
Intakes, Pipes,
no
Yes they did.
Yes
Put a turbo on it!
I know that some of the Honda motorcycles are .My Shadow is.
strap it to a rocket!
You don't.
yes
It is all down to how you drive it.
Honda makes how ever money it wants to make. like about 18 billon every yeae
Buy a bigger machine.........