kxr 50 90 Manuel atelier : Page 109

          7. CYLINDER HEAD/VALVES
  (Mongoose/KXR 90)                                  Mongoose/KXR 90/50


 INSTALLATION                                      Dowel Pins
 Reverse the "CAMSHAFT REMOVAL"
 procedures.
 Note the following points:
 1. Turn the flywheel so that the "T" mark on
    the flywheel aligns with the index mark
    on the crankcase.
    Keep the round hole on the camshaft
    gear facing up and align the punch marks
    on the camshaft gear with the cylinder
    head surface (Position the intake and
    exhaust cam lobes down.) and install the
    camshaft onto the cylinder head. (Refer
    to the "VALVE CLEARANCE" section
    in the chapter 3)

    Install the camshaft dowel pins and
    holder.
 · Apply engine oil to the threads of the
      cylinder head nuts.
    · Diagonally tighten the cylinder head
      nuts in 23 times.
    · Position the camshaft holder "EX"
      mark on the exhaust valve side.


 Torque:
       Cam shaft hold nut: 1.82.2kgf-m          Apply engine oil to threads

 2. Turn the cam chain tensioner screw
    counter-clockwise to release it.
    Apply engine oil to a new O-ring and
    install it.
    Tighten the cam chain tensioner cap bolt.
 Be sure to install the O-ring into the
    groove properly.


 3. Adjust the valve clearance. (Refer to the
 "VALVE CLEARANCE" section in the
 chapter 3)




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