13. BRAKE SYSTEM ATV 300/250 INSPECTION 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 (0.012 in) ASSEMBLY Reassemble the caliper in the reverse order of disassembly procedures and observe the following points. Wash the caliper components with fresh brake fluid before assembly. Do not wipe off brake fluid after washing the components. Replace the piston seal and dust seal with new ones with brake fluid applied. Brake fluid specification and classification: DOT4 13-17