2007-2009 Honda TRX300EX TRX300X service manual, Page 282Get this manual
HYDRAULIC DISC BRAKE Connect bleed hose to the front brake caliper bleed valve and bleed the system as follows:
Do not release the brake lever until the bleed valve has been closed
1Squeeze the brake lever all the way and loosen the bleed valve 14 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 valve
TORQUE: 5.4 N'm (0.6 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 again Fill 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 screwsSCREWS
TORQUE: 1.5 N'm (0.2 kgfm, 1.1Ibfft)