Zontes ZT350T-D Maintenance Manual page 23

Intake system (indicated by the green arrow):
Air → Air filter intake pipe → Air filter element → Air filter outlet pipe → Throttle valve assembly body → Intake manifold →
Cylinder → Muffler
Cylinder head exhaust gas control system (red arrow indicates):
Exhaust gas → cylinder head cover → cylinder head exhaust pipe → air filter → air filter outlet pipe → throttle valve body →
intake manifold → cylinder → muffler
Gearbox exhaust gas control system (indicated by the blue arrow):
Exhaust gas → gearbox exhaust pipe → air filter outlet pipe → throttle valve body → intake manifold → cylinder → muffle
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