For future reference when removing the stock air filter and fitting an aftermarket unit, to anyone who may need it, the head breather and carburetor ventilators can both be run to open air, in a location that they will not get water in them if it rains, or debris in them. I.E. route them so that their corresponding hoses terminate facing the ground. If you will not ever be riding in adverse weather, you can realistically leave the carburetor vent tube off, but the head case breather hose is a must, as on most bikes they will occasionally spit oil out and make a mess if it's not routed away from the shiny bits.
Hooking the head breather into the carburetor will build up unwanted pressure in both the carburetor and the engine, and it would never be advised to do this.
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