I've come across a lot of people writing about this, so thought I'd share my findings.
Regarding the fuel flow. Its to do with the pressure/vacuum build up in the fuel tank of the CB360's. Works fine when the tank is full right? As soon as it gets half, it wont flow anymore? The breather/sealer unit inside of the fuel cap gets rusted shut (preventing new air from getting in) and it creates a vacuum inside the tank preventing fuel flow. Take it apart, give it a good clean. You can replace the rivet with a nut and bolt.
Regarding the fuel flow. Its to do with the pressure/vacuum build up in the fuel tank of the CB360's. Works fine when the tank is full right? As soon as it gets half, it wont flow anymore? The breather/sealer unit inside of the fuel cap gets rusted shut (preventing new air from getting in) and it creates a vacuum inside the tank preventing fuel flow. Take it apart, give it a good clean. You can replace the rivet with a nut and bolt.