2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 282Get this manual
HYDRAULIC DISC BRAKE Apply silicone grease to the boot groove in the brake shaftInsta ll new boot into the grooves in the parking brake base and shaft properly
Install new O-ring into he parking brake baseInsta ll the base onto the caliper body and tighten the two bo ltsTORQUE: 22 N'm (2.2 kgf.m16I bfft)