2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 385Get this manual
4B-8 Front Brakes:
Front Brake Disc Removal and Installation
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Front Brake Disc Inspection
Removal 1) Remove the front wheel assemblyRefer to "FrontRear Wheel Removal and Installation in Section 2D (Page 2D-2)"2) Remove the front wheel hub and front brake disc coverRefer to "Front Wheel HubSteering Knuckle Removal and Installation in Section 2B (Page 2B-6)"3) Remove the brake disc (2) from the front wheel hub
Brake Disc Thickness 1) Dismount the front brake caliperRefer to "Front Brake Pad Replacement (Page 4B-2)"2) Inspect 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 defect is found
B933H24206008
Special tool (A): 0990020205 (Micrometer (0 25 mm)) Brake disc thickness Service limit: 2.5 mm (0.10 in)
I933H1420027-01