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3. INSPECTION/ADJUSTMENT ATV 150/125
Cylinder Head Cover
VALVE CLEARANCE
Inspect and adjust valve clearance while
the engine is cold (below 35).
Remove the cylinder head cover.
Bolts
Turn the flywheel counterclockwise 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.
Punch Marks
Valve Wrench
Inspect and adjust the valve clearance.
Valve Clearance: IN: 0.06 mm (0.0024 in)
EX: 0.06 mm (0.0024 in)
Loosen the lock nut and adjust by turning
the adjusting nut
Special tool:
Tappet adjuster E012
· Check the valve clearance again after
the lock nut is tightened.
CARBURETOR IDLE SPEED Throttle Stop Screw
· 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: 1700100rpm
When the engine misses or run erratic,
adjust the air screw.
Throttle Stop Screw
3-6