13. REAR WHEEL/SWING ARM/ HYDRAULIC BRAKE Mongoose/KXR 90/50 ASSEMBLY Before assembly, apply brake fluid to all removed parts. · During assembly, the main piston and spring must be installed as a unit without exchange. · When assembling the piston, soak the cups in brake fluid for a while. · Install the cups with the cup lips facing the correct direction. Install the main piston and snap ring. Install the rubber cover. Install the brake lever. Install the brake fluid tube with the bolt and two sealing washers. Fill the brake reservoir with recommended brake fluid to the upper level. Bleed air from the hydraulic brake system. (See page 13-15.) Fluid Tube Bolt Sealing Washer Place the brake master cylinder on the handlebar and install the master cylinder holder with the "UP" mark facing up, aligning the tab on the holder with the hole in the handlebar. First tighten the upper bolt and then tighten the lower bolt. Torque: 1.01.4kg-m "UP" Mark 13-19