The clutch has a self-adjusting property to compensate for its wear. The full free travel of the clutch pedal is in the range of 9-15 mm. If there is no clearance between the piston of the master cylinder and the pusher, then the release bearing presses on the diaphragm spring of the pressure plate, which leads to clutch slippage and other malfunctions.
1. Loosen the lock nut on the clutch pedal switch "A". Unscrew the switch until it no longer contacts the pedal. (Switch "A" should contact the clutch pedal at a point below the pedal pivot.)
2. Loosen the master cylinder pushrod lock nut and turn the pushrod in or out to set the desired clutch pedal travel and height. Pedal travel should be between 135-140 mm for Prelude models and 142 mm for Accord models. Pedal height should be 207 mm for Prelude models and 210 mm for Accord models.
3. Tighten the push rod lock nut.
4. Screw in the pedal switch "A" until it just touches the pedal, then turn it another 1/4-1/2 turn.
5. Tighten the lock nut on the switch.
[Original article on the website HondaBook.ru]