Honda 2003 ST1300lA Owner's Manual page 162

If the reserve tank is low or empty, don't ride without adding coolant (page
105 ). After adding coolant, turn the engine on and check the temperature
gauge.
If the number of segments do not drop, do not ride. The engine needs repair.
Transport your motorcycle to a Honda dealer (page 143
If the temperature drops to normal, check the coolant level. If it has gone
down, add more coolant.
If you are able to resume riding, continue to monitor the gauge frequently.
If there's a mild leak, you can ride for awhile, carefully watching the gauge. Be
prepared to stop and add more coolant or water. If the leak is bad, transport your
motorcycle to a Honda dealer (page 143
If Your Engine Overheats
).
Taking Care of the Unexpected
).
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