kxr 50 90 Workshop-manual : Page 105

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

                                                                     Bolts
 CYLINDER HEAD COVER
 REMOVAL
 Remove fuel tank. (Refer to the chapter 5)
 Disconnect the oil recycle tube at the
 cylinder head cover.

 Remove the four bolts at the cylinder head
 cover, then remove the cylinder head cover.

                                               Cylinder Head Cover



 INSTALLATION
 Install a new cylinder head cover O-ring
 and install the cylinder head cover.
 Install and tighten the cylinder head cover
 bolts.
 Torque: 0.81.2kgf-m
 Be sure to install the O-ring into the
    groove properly.
                                                                      O-ring


                                                               Bolt
 CAMSHAFT/CAMSHAFT
 HOLDER
 REMOVAL
 Remove the cylinder head cover. (Refer to
 the "CYLINDER HEAD COVER
 REMOVAL")

 Remove the cam chain tensioner cap, bolt
 and the O-ring.
 Turn the cam chain tensioner screw            Tensioner Cap         Tensioner Screw
 clockwise to tighten it.


 Turn the cooling fan clockwise so that the
 "T" mark on the flywheel aligns with the
 index mark on the crankcase to bring the
 round hole on the camshaft gear facing up
 to the top dead center on the compression
 stroke.




                                               Round Hole                    Punch Marks

                                                                                           7-4