Yamaha YZF-R125 Service Manual: Checking the connections

Check the leads, couplers, and connectors for stains, rust, moisture, etc.

1. Disconnect:

  • Lead
  • Coupler
  • Connector

2. Check:

  • Lead
  • Coupler
  • Connector

Moisture → Dry with an air blower.

Rust/stains → Connect and disconnect several times.

Checking the connections


3. Check:

  • All connections

Loose connection  →  Connect properly.

NOTE:

If the pin "1" on the terminal is flattened, bend it up.

Checking the connections


4. Connect:

  • Lead
  • Coupler
  • Connector

NOTE:

Make sure all connections are tight.

5. Check:

  • Continuity (with the pocket tester)

NOTE:

If there is no continuity, clean the terminals.

When checking the wire harness, perform steps (1) to (3).

As a quick remedy, use a contact revitalizer available at most part stores.

Checking the connections


    Circlips
    Before reassembly, check all circlips carefully and replace damaged or distorted circlips. Always replace piston pin clips after one use. When installing a circlip "1", make sure the sharp-edged ...

    Special tools
    The following special tools are necessary for complete and accurate tune-up and assembly. Use only the appropriate special tools as this will help prevent damage caused by the use of inappropriat ...

    Other materials:

    Removing and installing the cowlings and panel
    Removing and installing the cowlings and panel Cowling A Cowling B Cowling C Cowling D Panel A The cowlings and panel shown need to be removed to perform some of the maintenance jobs described in this chapter. Refer to this section each time a cowling or panel needs to be ...

    Checking the drive chain
    1. Measure: 15-link section "a" of the drive chain Out of specification Replace the drive chain. a. Measure the length "a" between the inner sides of the pins and the length "b" between the outer sides of the pins on a 15-link section of the drive chain as shown in the illustration. ...

    Installing the shift shaft
    1. Install: Stopper lever "1" Stopper lever spring "2" NOTE: Install the stopper lever spring as shown in the illustration. Hook the ends of the stopper lever spring onto the stopper lever and the crankcase boss "3". Mesh the stopper lever with the shift drum segment assembly. ...

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