kxr maxxer 250 300 Workshop-manual : Page 46

          3. INSPECTION/ADJUSTMENT                                                    ATV 300/250


                                                                 Cylinder Head Cover
 VALVE CLEARANCE
 Inspect and adjust valve clearance while
   the engine is cold (below 35).
 Remove the cylinder head cover. (See page
 7-4)




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

 Inspect and adjust the valve clearance.
 Valve Clearance: IN: 0.1 mm (0.004 in)
                    EX: 0.1 mm (0.004 in)



 Loosen the lock nut and adjust by turning                  Valve Wrench
 the adjusting nut

 Special tool:
 Tappet adjuster     E012
 · Check the valve clearance again after
      the lock nut is tightened.


                                                                        Round Hole
 CARBURETOR IDLE SPEED
 · The engine must be warm for accurate
      idle speed inspection and adjustment.
 Warm up the engine before this operation.
 Start the engine and connect a tachometer.
 Turn the throttle stop screw to obtain the
 specified idle speed.
 Idle Speed:
 ATV 250: 1500100 rpm
 ATV 300: 1600100rpm
 When the engine misses or run erratic,                     Air Screw      Throttle Stop Screw
 adjust the air screw.

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