A motorcycle technician diagnoses faults, repairs, replaces parts and does routine services on motorcycles, motor scooters, mopeds and all terrain vehicles (ATVs). repairing engines, brakes, electrical systems, ignition systems, fuel injection systems, plugs and carburettors. doing inspections and routine services. fitting tyres. customising or fitting accessories to motorcycles. A Mechanic, or a Vehicle Service Technician, repairs and maintains vehicles. Their top duties include diagnosing vehicle faults, repairing or replacing faulty parts and carrying out periodic maintenance.