Crankcase Ventilation Systems: Maintenance

Perform the following maintenance every 60, 000 miles or 5 years.

1. Disconnect breather hose from carburetor insulator. Clean orifice with a No. 57 (.043") drill bit. Compressed air may also be used to clear tube.
2. Inspect condensation chamber in air cleaner. Remove from air cleaner and clean thoroughly. Be sure gasket is installed in original position and all hoses are tight when reinstalling condensation chamber.
   Fig 1: Honda Crankcase Ventilation System

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   Note fresh air and blow-by vapor direction.