CHAPTER 3A ENGINE 260/ 300 / 400 cc ATV SERVICE MANUAL09.0
CHAPTER 3 ENGINE PAGE. 3A- 10
Adjustment steps:
zLoosen the locknut c
zTurn the adjuster ③ in or out with the valve
adjusting tool d until specified clearance is
obtained .
Turning in → Valve clearance is decreased
Turning out → Valve clearance is increased
zHold the adjuster to prevent it from moving
and tighten the locknut.
zMeasure the valve clearance.
zIf the clearance is incorrect, repeat above
steps until specified clearance is obtained.
7. Install:
zValve cover (intake side) c
zO-ringd
8 . Install:
zValve cover(exhaust side)
zO-ring
zSpark plug
zTiming check window screw
zCrankcase cover
8N.m( 0.8m.kg)
3.2.2 IDLING SPEED ADJUSTMENT
1. Start the engine and let it warm up for several
minutes.
2 . Attach :
z Inductive tachometer to the spark plug lead.
3. Check:
zEngine idling speed
Out of specification → Adjust.
Engine idling speed:
1,350-1,650 r/min