2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 257Get this manual
FRONT AND REAR BRAKES EBS00415
ASSEMBLING THE FRONT BRAKE MASTER CYLINDER WARNING
All internal brake components should be cleaned and lubricated with new brake fluid only before installationRecommended brake fluid DOT Whenever master cylinder is disassembled, replace the piston seals and dust seals
EBS00416
ASSEMBLING THE REAR BRAKE MASTER CYLINDER WARNING
All internal brake components should be cleaned and lubricated with new brake fluid only before installationRecommended brake fluid DOT Whenever master cylinder is disassembled, replace the piston seals and dust seals