I don't think you'd run it with the cover on - it would likely overheat.   
 
As to the air intake option - not likely. The existing air filter is tucked nicely into the engine as it is, and it's an excellent filter. 
 
The box could be for something ridiculous as the pull starter rope, and the frame around it stops the driver's foot from slipping away.... 
 
f
		 
		
		
		
		
		
		
			
				__________________ 
				Charles Fitton 
Maryhill On., 
Canada 
  
too many carriers 
too many rovers 
not enough time. 
(and now a BSA...) 
(and now a Triumph TRW...)
			 
		
		
		
		
		
	
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