2004-2006 (2007) Honda TRX400FA Fourtrax Rancher / TRX400FGA Rancher AT GPScape Service Manual, Page 196Get this manual
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CENTRIFUGAL CLUTCH WEIGHT LININGWEIGHT SPRINGCLUTCH SPRING
Remove the clutch weights and springs from the drive plate
Measure the weight lining thicknessSERVICE LIMIT: 2.0 mm (0.08 in)