90000 MI or 144000 KM

Inspect
    Choke Thermostat/Heater
      Inspect choke heat source.
    Carburetor
      Clean carburetor choke shaft, fast idle cam, and pivot pin.
Replace
    Oil Filter, Engine
    Engine Oil
      If your mileage is less than 7,500 miles (12,000 km) yearly, replace the engine oil filter at each oil change.