1999-2002 TRX400EX Fourtrax Service Manual, Page 201Get this manual
HYDRAULIC DISC BRAKE Reoeat the orevious orocedures until air bubbles do not appear in the bleed tube
If air is entering the bleeder from around the bleed valve threads, seal the threads with teflon tapeClose the bleed valve and operate the brake lever of pedalIf it still feels spongy, bleed the system again-
If brake bleeder is not availableuse the following procedure: Pump up the system pressure with the brake lever or pedal until lever or pedal resistance is felt
Connect bleed tube to the bleed valve and bleed the system as follows: 1Squeeze the brake lever or depress the brake pedal, open the bleed valve 14 turn and then close itNOTE: