14. REAR WHEEL/SWING ARM/ HYDRAULIC BRAKE ATV 50 SERVICE INFORMATION GENERAL INSTRUCTIONS · During servicing, keep oil or grease off the brake drum and brake linings. · Drain the brake fluid from the hydraulic brake system before disassembly. · Contaminated brake disk or brake pads reduce stopping power. Clean the contaminated brake disk with high-performance brake degreaser and replace the brake pads. · Do not use brake fluid for cleaning. · Bleed air from the brake system if the brake system is removed or the brake is soft. · Do not allow any foreign matters entering the brake reservoir when filling the brake reservoir with brake fluid. · Brake fluid will damage painted, coated surfaces and plastic parts. When working with brake fluid, use shop towels to cover and protect painted, rubber and plastic parts. Wipe off any splash of brake fluid with a clean towel. Do not wipe the motorcycle with a towel contaminated by brake fluid. · Make sure to use recommended brake fluid. Use of other unspecified brake fluids may cause brake failure. · Inspect the brake operation before riding. SPECIFICATIONS mm (in) Item Standard Service Limit Radial 2 (0.08) Rim run out Rear wheel Axial 2 (0.08) Rear brake drum I.D 130 (5.2) 131 (5.24) Rear brake lining thickness 4.5 (0.18) 2 (0.08) mm (in) Item Standard Limit Service Limit Brake disk thickness 3.7 (0.148) 3 (0.03) Brake disk runout 0.15 (0.006) 0.3 (0.003) Brake master cylinder I.D. 12.7 (0.508)12.743 (0.5097) 12.75 (0.51) Brake master cylinder piston 12.657 (0.5063)12.684 (0.5074) 12.64 (0.5056) Brake caliper piston I.D. 33.95 (1.358)33.99 (1.3596) 34.05 (1.362) Brake caliper cylinder O.D. 33.88 (1.3552)33.92 (1.3568) 33.85 (1.354) TORQUE VALUES Rear wheel nut 4.5 kgf-m (45 N-m, 32 lbf-ft) Rear shock absorber upper/lower mount bolt 4 kgf-m (40 N-m, 29 lbf-ft) Rear swing arm axle 7 kgf-m (70 N-m, 50 lbf-ft) Rear wheel hub nut 7 kgf-m (70 N-m, 50 lbf-ft) Rear wheel shaft nut 12 kgf-m (120 N-m, 86 lbf-ft) Brake arm bolt 2.2 kgf-m (22 N-m, 16 lbf-ft) Caliper holder bolt 2.7 kgf-m (27 N-m, 19 lbf-ft) Brake fluid tube bolt 3 kgf-m (30 N-m, 22 lbf-ft) Caliper bleed valve 0.6 kgf-m (6 N-m, 4 lbf-ft) Master cylinder bolt 1.2 kgf-m (12 N-m, 9 lbf-ft) 14-2