2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 446Get this manual
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5C-7 Clutch: Measure the claw width of drive plates with vernier calipersReplace the drive plates found to have worn down to the limitSpecial tool (A): 0990020102 (Vernier calipers (120 mm, 200 mm)) C