13. BRAKE SYSTEM MXU 250R/300R Remove the dust seals and piston seals. Seals Use care not to cause scratch on the cylinder bore. Do not reuse the piston seal and dust seal that have been removed. Piston INSPECTION (MXU 250) Inspect the caliper cylinder wall and piston surface for scratch, corrosion or other damages. If any abnormal condition is noted, replace the caliper. BRAKE DISK Measure the brake disk thickness. Service Limit: 3 mm (0.12 in) Measure the brake disk run out. Service Limit: 0.3 mm (0.012in) 13-20