Yamaha YZF-R125 Service Manual: Installing the engine

1. Install:

  • Engine "1"
  • Engine mounting bolt (rear lower side) "2"
  • Engine mounting nut (rear lower side) "3"
  • Engine mounting bolt (rear upper side) "4"
  • Engine mounting nut (rear upper side) "5"
  • Engine mounting bolt (front side) "6"
  • Engine mounting nut (front side) "7"

NOTE:

Do not fully tighten the bolts and nuts.

Installing the engine


2. Tighten:

  • Engine mounting nut (rear upper side)

  • Engine mounting nut (rear lower side)

  • Engine mounting nut (front side)

    Engine removal
    ...

    Installing the shift arm
    1. Install: Shift arm "1" NOTE: Make sure that the distance "a" between the center of the left rider footrest "2" and the center of the shift pedal "3" is within specification. ...

    Other materials:

    Checking the piston rings
    1. Measure: Piston ring side clearance Out of specification Replace the piston and piston rings as a set. NOTE: Before measuring the piston ring side clearance, eliminate any carbon deposits from the piston ring grooves and piston rings. 2. Install: Piston ring (into the cylind ...

    Adjusting the drive chain slack
    NOTE: The drive chain slack must be checked at the tightest point on the chain. CAUTION:A drive chain that is too tight will overload the engine and other vital parts, and one that is too loose can skip and damage the swingarm or cause an accident. Therefore, keep the drive ...

    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. c. Measure the spark plug cap resistance. ...

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