Iv never once changed this since i bought my kymco agility city 125. Its got about 1800km on it and in total its about 1 half years old. How important is it to change the oil for the breaks? Can i just suck out the oil from the reservoir or will i have to drain the system in order to do it properly? would it matter? Always meant to change or top this up eariler but when i realised it was much harder than a gear /engine oil change because the reservoir is under the dam plastic cover i ended up leaving it and leaving it.