2007 Yamaha Apex Factory Service Manual, Page 537Get this manual

2007 Yamaha Apex Factory Service Manual, Page 537

COOLING SYSTEM INSP ADJ 18.Bleed the air from the cooling system19.Inspect: Cooling system Decrease of pressure (leaks) Repair
as required Inspection steps: Attach the cooling system tester adapter to the coolant filler Cooling system tester: 90890-01325,