16. BRAKE SYSTEM MXU 550EXi/MXU 500i SERVICE INFORMATION GENERAL INSTRUCTIONS · During servicing, keep oil or grease off the brake pads and brake disk. · 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 machine 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 Unit: mm (in) Item Standard Service Limit Brake disk thickness FR:4.0(0.156) RR:5.0(0.195) FR:3 (0.12)RR:4(0.156) Brake disk runout 0.3 (0.012) TORQUE VALUES Caliper mounting bolt 2.7 kgf-m (27N-m, 19.5 lbf-ft) Brake pad mounting bolt 1.8 kgf-m (18 N-m, 13 lbf-ft) Brake disc bolt 3.5 kgf-m (35 N-m, 25.2 lbf-ft) Bleed valve nut 0.6 kgf-m (6 N-m, 4.32 lbf-ft) Brake hose bolt 3.5 kgf-m (35 N-m, 35 lbf-ft) Master cylinder mounting bolt 1.2 kgf-m (12 N-m, 8.6 lbf-ft) Delay valve mounting bolt 1.2 kgf-m (12 N-m, 8.6 lbf-ft) Delay valve plug 5 kgf-m (50 N-m, 36 lbf-ft) 16-2