zx scout 50 Workshop-manual : Page 130

          13. STEERINGHANDLEBAR/FRONTWHEEL/FRONT
    BRAKE/FRONTSHOCKABSORBER/FRONTFORK                                      ZX / SCOUT 50

 SERVICE INFORMATION
 SPECIFICATIONS
                      Item                        Standard (mm)         Service Limit (mm)
 Axle shaft runout                                                               0.2
                                      Radial                                     2.0
 Front wheel rim runout
                                      Axial                                      2.0
 Front brake drum I.D.                                  110                     111
 Front brake lining thickness                           4.0                     2.0
 Front shock absorber spring free length                200                    182.8
 Brake disk thickness                                 353.8                     3.0
 Brake disk runout                                                              0.30
 Brake master cylinder I.D.                       12.70012.743                 12.75
 Brake master cylinder piston O.D.                12.65712.684                 12.64
 Brake caliper piston O.D.                        25.40025.405                 25.45
 Brake caliper piston I.D.                        25.31825.368                 25.30

 TORQUE VALUES
 Handlebar lock nut          4.05.0kg-m          Front damper nut            1.53.0kg-m
 Steering stem lock nut      8.012.0kg-m         Front axle nut              5.07.0kg-m
 Steering top cone race      0.51.3kg-m          Brake arm bolt              0.40.7kg-m

 SPECIAL TOOLS
 Lock nut wrench                                 Driver handle A
 Lock nut socket wrench                          Outer driver, 37x40mm
 Outer driver, 28x30mm                           Pilot, 10mm
 Rear shock absorber remover                     Bearing puller
 Rear shock absorber compressor                  Snap ring pliers (close)
 Ball race remover                               Damper compressor

 TROUBLESHOOTING
 Hard steering (heavy)                           · Contaminated brake disk or disk pad
 · Excessively tightened steering stem top       · Worn brake bushing
   cone race                                     · Worn brake master cylinder piston oil seal
 · Broken steering balls                         · Clogged brake fluid line
 · Insufficient tire pressure                    · Deformed brake disk
 Steers to one side or does not track straight   · Unevenly worn brake caliper
 · Broken clutch weight spring                   Front wheel wobbling
 · Bent front fork                               · Bent rim
 · Bent front axle or uneven tire                · Loose front axle
 Poor brake performance                          · Bent spoke plate
 · Incorrectly adjusted brake                    · Faulty tire
 · Worn brake linings                            · Improperly tightened axle nut
 · Contaminated brake lining surface             Soft front shock absorber
 · Worn brake cam                                · Weak shock springs
 · Worn brake drum                               · Insufficient damper oil
 · Poorly connected brake arm                    Front shock absorber noise
 Poor brake performance (disk brake)             · Slider bending
 · Air in brake system                           · Loose fork fasteners
 · Deteriorated brake fluid                      · Lack of lubrication

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