2007-2009 Suzuki LTZ90 factory service manual, Page 99Get this manual
DRIVE BELT INSPECTION Inspect that the drive belt is free from any greasy substanceInspect the contact surface of the drive belt for cracks or damage and measure the width of the drive belt with vernier calipersIf any defects are found or the measurement exceeds the service limit, replace the drive belt with new one
If grease or oil is present on the surface of the drive belt, degrease the belt thoroughlyDrive belt width: Service Limit: 18.9 mm (0.74 in)