1989 Honda FL400R Pilot Service Manual, Page 55Get this manual
COOLING SYSTEM
COOLANT REPLACEMENT
The engine must be cool before servicing the cooling systemor severe scalding may result
Remove the radiator cap (page 5-3)Drain the coolant from the system by removing the drain bolt on the right crankcase coverDrain the coolant from the cylinder by removing the drain
boltInstall the drain bolts after making sure their sealing washers are in good condition
TORQUE: 10 Nom (1.0 kgom ft-Ib) Fill the system with 50-50 mixture of distilled water and ethylene glycol