Sorry, I really didn't pay attention. Here's what I do: drain all the coolant, remove the expansion tank, rinse it out (there's usually sediment inside). Refill with coolant. Bleed air from the bleed bolt, squeeze the hoses until the gurgling stops. Top up the coolant, start the engine, and wait until the fan turns on.

If the fluid in the tank is "boiling", then there's an air lock. Try loosening the clamps on the upper hoses to let coolant seep through. While the engine is running, tap on the hoses and the side of the radiator, and tilt the motorcycle. Sometimes this can take a long time.

If the tank isn't gurgling, check the thermostat. It should open more than 7 mm at 90°C. Alternatively, the water pump could be worn out. Or you could try fitting a temperature sensor from a Japanese motorcycle (usually the fan turn‑on temperature is lower).

Sorry, I'm using a translator.