2003 Suzuki LT-Z400 Factory Service Manual, Page 275Get this manual
SERVICING INFORMATION
Complaint Rear wheels wobble
Symptom and possible causes
1Distorted rear wheel rims2Damage or worn rear axel housing bearings3Defective or incorrect rear tires4Loose rear wheel hub nuts5Distorted rear axle6Loosen rear axle housing mounting bolts7Improper rear brake adjustment8Damaged or worn rear swingarm and related bearings9Rear shock absorber leaks oil10Loose rear swingarm nutReplaceReplaceReplaceTightenReplaceTightenAdjustReplaceReplaceTighten
Complaint Poor brakingSymptom and possible causes Remedy
Refill to level markBleed air outReplaceReplaceAdjustRepair or replaceReplaceClean disc and padsReplaceBleedRepair surface with emery paperModify pad fitting or replaceTighten to specified torqueReplaceReplace brake fluidDisassemble and clean master cylinderClean and lubricateBleedReplenish fluid to specified level and bleed airReplace with correct fluidTighten to specified torque and add brake fluidReplaceReplace piston andor cupClean and lubricateLubricateAdjust