On models up to 1989, Honda does not specify a recommended inspection or replacement interval. However, since these engines utilize an interference design, it is highly recommended to at least inspect the timing belt at 60,000 mile (96,000 km) intervals. It is an even better idea to replace the belt at these intervals. On 1990-1994 models, Honda recommends the timing belt to be replaced at 90,000 mile (144,000 km) intervals. Replacing the timing belt before it's recommended interval is a wise choice. It is far less expensive to replace the belt than to repair the engine damage which results from the belt breaking.
Inspect the belt for cracks, missing teeth and wear on any of the surfaces. Inspect the sprockets for grease and other deposits. If any of these conditions exist, the belt should be replaced. Please refer to Engine & Engine Rebuilding for procedures on timing belt removal and installation.