13. REAR WHEEL/SWING ARM/ HYDRAULIC BRAKE Mongoose/KXR 90/50 INSPECTION Inspect the caliper cylinder wall and piston surface for scratch, corrosion or other damages. If any abnormal condition is noted, replace the caliper. ASSEMBLY Clean all removed parts. Apply silicon grease to the pistons and oil seals. Lubricate the brake caliper cylinder inside wall with brake fluid. Install the oil seals and then install the brake caliper pistons with the grooved side facing out. Install the piston with its outer end protruding 35mm beyond the brake caliper. Wipe off excessive brake fluid with a clean shop towel. Apply silicon grease to the brake caliper holder pin and caliper inside. Install the brake caliper holder. 13-21