Use Trans-dapt's Carburetor Hat to keep foreign objects from falling into the carburetor during service. Inexpensive insurance against costly damage.
 
Part # ProductMaterial Media
2012 Plastic "CARBURETOR Hat" for 5-1/8" Neck Carburetors
Photo
$6.73
2007 Spun Aluminum Carb Cover 5 1/8" Neck
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$25.04
 
http://hedman.com/images/ePIM/original/2012.jpg
http://hedman.com/images/ePIM/original/2007.jpg