2007-2009 Honda TRX300EX TRX300X service manual, Page 302Get this manual
HYDRAULIC DISC BRAKE The brake shaft has left-hand threads
Apply silicone grease to the inner and outer threads of the parking brake shaftPosition the shaft so that the punch mark is within the reference marks on the base, nd thread itScrew the shaft in fully and make sure that the punch mark is within the reference marks
REFERENCE MARKS
Apply silicone grease to the boot groove in the brake shaftInstall the boot into the grooves in the parking brake base and shaft properlyIf the boot is hard or deteriorated, replace it with new one