Service Manual — page 245 of 715

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COOLING SYSTEM 4-19
Radiator
Radiator Cap Inspection
• Remove:
   Right Middle Fairing (see Middle Fairing Removal in the
      Frame chapter)
      Radiator Cap
•   Check the condition of the bottom [A] and top [B] valve
    seals and valve spring [C].
    If any one of them shows visible damage, replace the cap
    with a new one.

• Install the cap [A] on a cooling system pressure tester [B].
                              NOTE
    ○Wet the cap sealing surfaces with water or coolant to
      prevent pressure leaks.

• Watching  the pressure gauge, pump the pressure tester
  to build up the pressure until the relief valve opens: the
    gauge needle flicks downward. Stop pumping and mea-
    sure leak time at once. The relief valve must open within
    the specified range in the table below and the gauge hand
    must remain within the same range for at least 6 seconds.
    Radiator Cap Relief Pressure
      Standard: 93 ∼ 123 kPa (0.95 ∼ 1.25 kgf/cm², 13 ∼ 18
                  psi)
    If the cap can not hold the specified pressure or if it holds
    too much pressure, replace it with a new one.
Radiator Filler Neck Inspection
• Remove:
   Right Middle Fairing (see Middle Fairing Removal in the
     Frame chapter)
     Seat (see Seat Removal in the Frame chapter)
     Bolts [A], Collars and Washers
     Quick Rivet [B]