What air filter is that, where can I get one, and how does it compare to a standard one? Is it beneficial or does it have a negative impact or does it not make a difference?

I like the clean look of the plain engine cover

its just a twin cone, can get them any where, will loose power if you have injection, not sure what it do with a carb, maybe would need re jetting

Ah right, thanks for the info.
Will stay with the one I have then.

Thanks