Beat exhaust shoot, Indications SASS Start Damaged

Honda Beat Biker sometimes feel heard gunshots from the exhaust. Many indications that could be causing it. Like the wind in the carburetor settings are less fit, unhealthy plugs and others. But, when checked, usually all of these parts are still fairly good.
The shooting problem can be derived from the SASS or Secondary Air Supply System which are destroyed. Its simple, functional SASS inject clean air into the exhaust gas stream of the rest, so that carbon dioxide is not too thick. When SASS are destroyed, the air flow is interrupted and eventually causes a sound like gunfire.
To overcome this phenomenon, a black cap hose from the cylinder head toward the SASS wear plugs. Gunshots guaranteed lost.