How do you change coolant in 2002 Honda 1800 motorcycle?

search for the drain cup on the radiator, remove the lower radiator belt from the radiator and aim at a bucket to clean the antifreeze out of both the radiator and the engine. Crank engine over for a maximum of 5 seconds, remove sparkplugs so engine can't start. Once the engine and the radiator have stopped leaking coolant (may take 20-30 minutes), re-attach lower rad hose to both lower engine and radiator. Open vent cap on radiator look at the thermostat housing for a bleed valve, fill radiator, re-install spark plugs, crank engine over to force coolant from radiator to engine, leaving bleed valve open while you continue to fill the radiator until you have a steady stream with no air being released from the bleed valve, close bleed valve. Replace rad cap, allow engine to run 2-3 minutes, check temp gage for engine temp. Open rad cap, check level of coolant in rad. Top up fluid to just below the rad cap or the marked fill line on the radiator spout. If the engine is running warmer than normal, allow engine to continue to run, re-open bleed valve until vapour lock exits bleed valve and you again have a steady stream of coolant allowing engine to continue to run. Check temp gage to verify thermostat is operational and engine is at normal operating temp. If still running warmer than usual, redo the steps to remove any trapped air (vapour lock) until engine runs at normal operating temp. Fill engine coolant reservoir to maximum line and you should be fine