Hi everyone im a newbie to the forum and to aprilias as well i just changed one of the radiators and refilled it with new coolant i filled it thru the fill cap side but after putting in about 3 liters the low & max on the overflow tank does not show any coolant but when i try to put some more in it just spills like if it were full already is there a certain way to do this plus i dont think that the coolant circulates when i turn on the bike, has anybody had tjis problem, could it be the circulating pump and if so is there a way to check it. thanks everyone for the help.