The coolant change should have been super easy. Drain off the water pump, easy access to the radiator cap, and the design that has a bleed hose from the thermostat to the water pump side. To get the coolant drained took some tipping side to side. Did not measure the drain but seemed like more than a liter, and it did not look all that bad coming from 6 years of use. On refilling the system, fill in small amounts, like 100 cc at a time, and check the filler neck. I measured out 750 cc for the capacity of the radiator and poured into my funnel. Next thing I saw was coolant pooling under the scooter. What a mess. I finally got it filled by steps of filling to the radiator neck, putting the cap on and running the machine till the temperature showed that the thermostat had opened. Also found that running without the cap will overflow the radiator, and if motor has not cooled down enough the coolant will flood out the filler. "Cyclepedia" instructions seemed so easy. Job done, it's winter and not riding for a couple days with this maintenance no big deal. Glad I filled with long life coolant.
Art
