2006 Honda TRX680 Rincon Factory Service Manual, Page 416Get this manual
BRAKE SYSTEM If the brake bleeder is not available, perform the following procedure: Pump up the system pressure with the front brake lever until the lever resistance is feltConnect bleed hose to the front brake caliper bleed valve and bleed the system as follows:
brake lever until the bleed valve has been closed
Do not release the 1Squeeze the brake lever all the way and loosen the bleed valve 12 of turnWait several seconds and then close the bleed valve2Release the brake lever slowly and wait several seconds after it reaches the end of its travel3Repeat the steps and until there are no air bubbles in the bleed hoseTighten the bleed valveTORQUE: 5.4 N-m (0.55 kgfm, 4.0 Ibf-ft) Perform air bleeding for the other side bleed valveAfter bleeding air, operate the front brake leverIf it still feels spongy, bleed the system againFill the front master cylinder reservoir to the casting ledge with DOT brake fluid from sealed containerInstall the diaphragm, set plate and reservoir cap, and tighten the screwsTORQUE: 1.5 N-m (0.2 kgfm, 1.1 Ibf-ft)