Throttle Cable Adjustment

Remove the bolts and the throttle cable cover (A).

Fig 1: Removing Throttle Cable Cover With Bolts
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check cable free play at the throttle linkage. Cable free play (A) should be 10-12 mm (3/8-1/2 in.).

Fig 2: Checking Cable Free Play At Throttle Linkage
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the free play (A) is not within spec (10-12 mm, 3/8-1/2 in.), loosen the locknut (B), turn the adjusting nut (C) until the deflection is as specified, then retighten the locknut.
With the cable properly adjusted, check the throttle valve to be sure it opens fully when you push the accelerator pedal to the floor. Also check the throttle valve to be sure it returns to the idle position whenever you release the accelerator pedal.