2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 383Get this manual
Front Brakes:
Front Brake Disc Inspection
Brake Disc Thickness 1) Dismount the front brake caliperRefer to "Front Brake Caliper Removal and Installation (Page 4B3)"2) Check the brake disc for damage or cracks and measure the thickness using the micrometerReplace the brake disc if the thickness is less than the service limit or if detect is found
B827H24206008
Brake Disc Runout 1) Dismount the front brake caliperRefer to "Front Brake Caliper Removal and Installation (Page 4B3)"2) Measure the runout using the dial gaugeReplace the disc if the runout exceeds the service limitSpecial tool (A): 0990020607 (Dial gauge (1100 mm, 10 mm)) (B): 0990020701 (Magnetic stand) Brake disc runout Service limit: 0.30 mm (0.012 in)
Special tool (A): 0990020205 (Micrometer (0 25 mm)) Brake disc thickness Service limit (Front): 3.0 mm (0.12 in)