Yamaha YZF-R125 Service Manual: Installing the front brake caliper

Yamaha YZF-R125 Service Manual / Chassis / Front brake / Installing the front brake caliper

1. Install:

Brake caliper "1" (temporarily)
Copper washers "2"

Brake hose "3"
Brake hose union bolt "4"

WARNING

Proper brake hose routing is essential to insure safe vehicle operation. Refer to "CABLE ROUTING" on page 2-33.

CAUTION:

Install the brake hose at a 17 angle to the front brake caliper as shown in the illustration.
While holding the brake hose, tighten the union bolt.

Installing the front brake caliper

2. Remove:

Brake caliper

3. Install:

Brake pad spring
Brake pads
Brake caliper
Brake hose holder

Refer to "REPLACING THE FRONT BRAKE PADS" on page 4-22.

4. Fill:

Brake master cylinder reservoir (with the specified amount of the recommended brake fluid)

WARNING

Use only the designated brake fluid. Other brake fluids may cause the rubber seals to deteriorate, causing leakage and poor brake performance.
Refill with the same type of brake fluid that is already in the system. Mixing brake fluids may result in a harmful chemical reaction, leading to poor brake performance.
When refilling, be careful that water does not enter the brake master cylinder reservoir.

Water will significantly lower the boiling point of the brake fluid and could cause vapor lock.

CAUTION:

Brake fluid may damage painted surfaces and plastic parts. Therefore, always clean up any spilt brake fluid immediately.

5. Bleed:

Brake system Refer to "BLEEDING THE HYDRAULIC BRAKE SYSTEM" on page 3-20.

6. Check:

Brake fluid level Below the minimum level mark "a"
Add the recommended brake fluid to the proper level.

Refer to "CHECKING THE BRAKE FLUID LEVEL" on page 3-18.

Installing the front brake caliper

7. Check:

Brake lever operation Soft or spongy feeling → Bleed the brake system.

Refer to "BLEEDING THE HYDRAULIC BRAKE SYSTEM" on page 3-20.

Assembling the front brake caliper

WARNING Before installation, all internal brake components should be cleaned and lubricated with clean or new brake fluid. Never use solvents on internal brake components as ...

Removing the front brake master cylinder

NOTE: Before removing the front brake master cylinder, drain the brake fluid from the entire brake system. 1. Disconnect: Front brake light switch 2. Remove: Brake hose union bolt Copp ...

Other materials:

Checking the transmission
1. Measure: Main axle runout (with a centering device and dial gauge "1") Out of specification Replace the main axle. 2. Measure: Drive axle runout (with a centering device and dial gauge "1") Out of specification Replace the drive axle. 3. Check: Transmiss ...

Supporting the motorcycle
Since this model is not equipped with a centerstand, follow these precautions when removing the front and rear wheel or performing other maintenance requiring the motorcycle to stand upright. Check that the motorcycle is in a stable and level position before starting any maintenance. A ...

Checking the timing chain tensioner
1. Check: Timing chain tensioner Cracks/damage/rough movement Replace. a. Lightly press the timing chain tensioner rod into the timing chain tensioner housing by hand. NOTE: While pressing the timing chain tensioner rod, wind it clockwise with a thin screwdriver "1" until it stops. b. ...