Deflection Method: Inspection

Apply a force of 98 N (10 kgf, 22 lbf) and measure the deflection between the power steering pump pulley (A) and the crankshaft pulley (B).
Deflection:
1. Used Belt: 13.0-16.5 mm (0.51-0.65 in.)
2. New Belt: 8.5-11.0 mm (0.33-0.43 in.)
Fig 1: Measuring Deflection Between Power Steering Pump Pulley & Crankshaft Pulley
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specifications.