Yamaha YZF-R125 Service Manual: Checking the ignition spark gap

Yamaha YZF-R125 Service Manual / Electrical system / Electrical components / Checking the ignition spark gap

1. Check:

Ignition spark gap Out of specification Perform the
ignition system troubleshooting, starting with step 5.

Refer to "TROUBLESHOOTING" on page 8-3.

NOTE:

If the ignition spark gap is within specification, the ignition system circuit is operating normally.

a. Disconnect the spark plug cap from the spark plug.

b. Connect the ignition checker "1" as shown.

Checking the ignition spark gap

2. Spark plug cap

c. Set the main switch to "ON" and the engine stop switch to " ".

d. Measure the ignition spark gap "a".

e. Crank the engine by pushing the start switch " " and gradually increase the
spark gap until a misfire occurs.

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 ...

Checking the crankshaft position sensor

1. Disconnect: Crankshaft position sensor coupler (from the wire harness) 2. Check: Crankshaft position sensor resistance Out of specification Replace the crankshaft position senso ...

Other materials:

Checking the steering
Worn or loose steering bearings may cause danger. Therefore, the operation of the steering must be checked as follows at the intervals specified in the periodic maintenance and lubrication chart. Place a stand under the engine to raise the front wheel off the ground. WARNING! To ...

Checking and lubricating the sidestand
Checking and lubricating the sidestand The operation of the sidestand should be checked before each ride, and the sidestand pivot and metal-to-metal contact surfaces should be lubricated if necessary. WARNING If the sidestand does not move up and down smoothly, have a Yamaha deal ...

Replacing the front brake pads
NOTE: When replacing the brake pads, it is not necessary to disconnect the brake hose or disassemble the brake caliper. 1. Measure: Brake pad wear limit "a" Out of specification Replace the brake pads as a set. 2. Install: Brake pad support Brake pad spring Brake pads ...