Yamaha YZF-R125 Service Manual: Assembling the crankcase

Yamaha YZF-R125 Service Manual / Engine / Crankcase / 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.

Assembling the crankcase


3. Install:

  • Right crankcase

NOTE:

Turn the shift drum segment "1" to the position shown in the illustration. In this position, the shift drum segment teeth will not contact the crankcase during crankcase installation.

Assembling the crankcase


4. Install:

  • Crankcase bolts

NOTE:

Tighten each bolt 1/4 of a turn at a time, in stages and in the proper sequence as shown.

  • M6 × 70 mm : "7-9", "11"
  • M6 × 55 mm : "14", "15"
  • M6 × 45 mm : "1-5", "10"

Assembling the crankcase


A. Left crankcase

B. Right crankcase

    Installing the bearing retainer
    1. Install: Bearing retainer "1" NOTE: Install the bearing retainer "1" with its "OUT" mark "a" facing outward. Apply locking agent (LOCTITE) to the threads of the bearing retainer bo ...

    Crankshaft
    ...

    Other materials:

    Coolant
    The coolant level should be checked before each ride. In addition, the coolant must be changed at the intervals specified in the periodic maintenance and lubrication chart. To check the coolant level Place the vehicle on a level surface and hold it in an upright position. TIP ...

    Checking the valves and valve guides
    The following procedure applies to all of the valves and valve guides. 1. Measure: Valve-stem-to-valve-guide clearance Out of specification Replace the valve guide. Valve-stem-to-valve-guide clearance = Valve guide inside diameter "a" - Valve stem diameter "b" 2. Replace: ...

    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 ...

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