Yesterday was the first ride after repair. I cleaned radiator and changed coolant. Valves were regulated too. After 5 kilometers the engine was very hot. There was no ‘HOT ENGINE’ on the display. I added about 50 ml of fluid and after the engine has cooled down, tried again. The same, too hot engine. Can you tell me, is there a way to remove air from the system? I expect, this is the reason of trouble. Quad was in the garage for over a year, without starting the engine.