9. DRIVE AND DRIVEN PULLEYS MXU 300/250 Measure the clutch lining thickness. Service Limit (replace if below): 0.5 mm (0.02 in) INSPECTION Measure the driven face spring free length. Service Limit (replace if below): 131 mm (5.24 in) Check the driven face for wear or damage. Measure the driven face O.D. Service Limit (replace if below): 39.94 mm (1.5976 in) 9-10