Service Manual — page 421 of 715

Text on this page

FINAL DRIVE 11-15
Sprocket, Coupling
Coupling Damper Inspection
• Remove  the rear wheel coupling, and inspect the rubber
  dampers [A].
• Replace
  rated.
          the damper if it appears damaged or deterio-

Sprocket Wear Inspection
• Visually inspect the engine and rear sprocket teeth for
  wear and damage.
  If the teeth are worn as illustrated, replace the sprocket,
  and inspect the drive chain wear (see Drive Chain Wear
  Inspection in the Periodic Maintenance chapter).
    Worn Tooth (Engine Sprocket) [A]
    Worn Tooth (Rear Sprocket) [B]
    Direction of Rotation [C]
                            NOTE
  ○If a sprocket requires replacement, the chain is proba-
    bly worn also. When replacing a sprocket, inspect the
    chain.
Rear Sprocket Warp Inspection
• Raise    the rear wheel off the ground with the stand so that
  it will turn freely.
• Set  a dial gauge [A] against the rear sprocket [B] near the
  teeth as shown, and rotate [C] the rear wheel to measure
  the sprocket runout (warp). The difference between the
  highest and lowest dial gauge readings is the amount of
  runout (warp).
  If the runout exceeds the service limit, replace the rear
  sprocket.
  Rear Sprocket Warp
    Standard:    TIR 0.4 mm (0.016 in.) or less
    Service Limit: TIR 0.5 mm (0.020 in.)