Yamaha YZF-R125 Owners Manual: Starting the engine

In order for the ignition circuit cut-off system to enable starting, one of the following conditions must be met:

  • The transmission is in the neutral position.
  • The transmission is in gear with the clutch lever pulled and the sidestand up.

1. Turn the key to "ON" and make sure that the engine stop switch is set to"".


The following warning lights and indicator light should come on for a few seconds, then go off.

  • Neutral indicator light
  • Turn signal indicator light
  • High beam indicator light
  • Coolant temperature warning light
  • Engine trouble warning light

NOTICE
If a warning or indicator light does not go off, see page 3-2 for the corresponding warning and indicator light circuit check.

  1. Shift the transmission into the neutral position. (See page 5-2.) The neutral indicator light should come on. If not, ask a Yamaha dealer to check the electrical circuit.
  2. Start the engine by pushing the start switch. NOTICE: For maximum engine life, never accelerate hard when the engine is cold!

    If the engine fails to start, release the start switch, wait a few seconds, and then try again. Each starting attempt should be as short as possible to preserve the battery. Do not crank the engine more than 10 seconds on any one attempt.

    Operation and important riding points
    Read the Owner's Manual carefully to become familiar with all controls. If there is a control or function you do not understand, ask your Yamaha dealer. WARNING Failure to familiarize yoursel ...

    Shifting
    Shifting Shift pedal Neutral position Shifting gears lets you control the amount of engine power available for starting off, accelerating, climbing hills, etc. The gear positions a ...

    Other materials:

    Checking the ignition timing
    NOTE: Prior to checking the ignition timing, check the wiring connections of the entire ignition system. Make sure all connections are tight and free of corrosion. 1. Remove: Rider seat Left lower side cowling Refer to "GENERAL CHASSIS" on page 4-1. 2. Remove: Timing mark acces ...

    Assembling the crankcase
    1. Thoroughly clean all the gasket mating surfaces and crankcase mating surfaces. 2. Apply: Sealant (onto the crankcase mating surfaces) NOTE: Do not allow any sealant to come into contact with the oil gallery. 3. Install: Right crankcase NOTE: Turn the shift drum segment ...

    Checking the clutch housing
    1. Check: Clutch housing dogs "1" Damage/pitting/wear  Deburr the clutch housing dogs or replace the clutch housing. NOTE: Pitting on the clutch housing dogs will cause erratic clutch operation. 2. Check: Bearing Damage/wear Replace the bearing and clutch housin ...

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