Yamaha YZF-R125 Service Manual: Checking the spark plug cap

1. Check:

Spark plug cap resistance Out of specification Replace.


a. Remove the spark plug cap from the spark plug lead.

b. Connect the pocket tester ( × 1k)
to the spark plug cap as shown.


Checking the spark plug cap


c. Measure the spark plug cap resistance.

    Checking the diode
    1. Check: Diode Out of specification Replace. NOTE: The pocket tester or the analog pocket tester readings are shown in the following table. a. Disconnect the diode from the wire harness. ...

    Checking the ignition coil
    1. Check: Primary coil resistance Out of specification  Replace. a. Disconnect the ignition coil connectors from the ignition coil terminals. b. Connect the pocket tester ( × 1) to ...

    Other materials:

    Installing the front brake caliper
    1. Install: Brake caliper "1" (temporarily) Copper washers "2" Brake hose "3" Brake hose union bolt "4" WARNINGProper brake hose routing is essential to insure safe vehicle operation. Refer to "CABLE ROUTING" on page 2-33. CAUTION: Install the brake ...

    Installing the valves
    The following procedure applies to all of the valves and related components. 1. Deburr: Valve stem end (with an oil stone) 2. Lubricate: Valve stem "1" Valve stem seal "2" (with the recommended lubricant) 3. Install: Lower spring seat "1" Valve stem seal "2" V ...

    Installing the exhaust assembly
    1. Install: Exhaust assembly "1" Exhaust pipe nuts "2" Exhaust assembly bolts "3" "4" NOTE: Do not fully tighten the nuts and bolts. 2. Tighten: Exhaust pipe nuts "2" Exhaust assembly bolt "4" Exhaust assembly bolt "3" ...

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