2003 Suzuki LT-Z400 Factory Service Manual, Page 165Get this manual
6-19 Place the vehicle on level surface and keep the handlebar Remove the master cylinder reservoir cap and diaphragm, Suck up the old brake fluid as much as possible, Fill the reservoir with new
a clear hose to the air bleeder valve and insert the oUler end of the hose into Loosen the air bleeder valve and pump the brake lever until the old brake fluid is completely out of the brakeClose the air bleeder valve and disconnect the clear hosSe Fill the reservoir with nelrv brake fluid to the upper end of the window, Brake air bleedel' valve: 7.5 Nm