Yamaha YZ250X 2022 Owner's Service Manual

REAR BRAKE4-29cleaning and lubricating.• Never use solvents on internal brake com-ponents as they will cause the piston sealsto swell and distort.• When the brake caliper is disassembled, re-place the brake caliper piston seal and thebrake caliper piston dust seal with newones.EAM30047INSTALLING THE REAR BRAKE CALIPER1. Install:• Rear brake caliper• Rear brake caliper bracket2. Install:• Rear wheelRefer to “REAR WHEEL” on page 4-7.• Copper washer• Brake hose• Union boltWARNINGEWA13531Proper brake hose routing is essential to in-sure safe vehicle operation.NOTICEECA24490Make sure that a bend in its pipe portion “a”is directed as shown and the brake hosetouches the projection “b” on the brake cali-per.3. Install:• Brake pad spring• Brake pad• Brake pad pin• Brake pad pin plugRefer to “CHECKING THE REAR BRAKEPADS” on page 3-14.4. Pour brake fluid to the brake fluid reservoir upto the specified level.WARNINGEWA13090• Use only the designated brake fluid. Otherbrake fluids may cause the rubber seals todeteriorate, causing leakage and poorbrake performance.• Refill with the same type of brake fluid thatis already in the system. Mixing brake fluidsmay result in a harmful chemical reaction,leading to poor brake performance.• When refilling, be careful that water doesnot enter the brake fluid reservoir. Waterwill significantly lower the boiling point ofthe brake fluid and could cause vapor lock.NOTICEECA13540Brake fluid may damage painted surfacesand plastic parts. Therefore, always clean upany spilt brake fluid immediately.5. Bleed:• Brake systemRefer to “BLEEDING THE HYDRAULICBRAKE SYSTEM” on page 3-15.6. Check:• Brake fluid levelThe minimum level mark or below  Add.Refer to “CHECKING THE BRAKE FLUIDLEVEL” on page 3-14.7. Check:• Brake pedal operationA softy or spongy feeling  Bleed the brakesystem.Refer to “BLEEDING THE HYDRAULICBRAKE SYSTEM” on page 3-15.EAM30048REMOVING THE REAR BRAKE MASTERCYLINDERTIPBefore removing the rear brake master cylinder,drain the brake fluid from the entire brake sys-Specified brake fluidDOT 4Rear brake hose union bolt30 N·m (3.0 kgf·m, 22 lb·ft)NewT R..bb aBrake pad pin17 N·m (1.7 kgf·m, 13 lb·ft)Brake pad pin plug2.5 N·m (0.25 kgf·m, 1.8 lb·ft)Specified brake fluidDOT 4T R..