Ok so I am going to replace my brake lines, and was wondering what the best way to do this would be. Should I just drain all the brake fluid and then replace them and add the new fluid? If I completly drain out all the fluid and replace the lines how should I go about adding the new fluid? Should I just open the bleeder valve on the left side first (and keep the right side bleeder valve closed) and starting pumping the brake lever while I keep adding fluid until it starts coming out the left side then close it and open the right side bleeder and add fluid until it starts coming out that side? If I do this do you think I will get any air bubbles in it, even if I keep toping off the resevior? Thanks in advance. The more details the better for me.