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INSP
ADJ
IDLE SPEED ADJUSTMENT/
VALVE CLEARANCE ADJUSTMENT
EC35M021
IDLE SPEED ADJUSTMENT
1. Start the engine and thoroughly warm it
up.
2. Adjust:
● Idle speed
Adjustment steps:
● Adjust the pilot screw.
Refer to “PILOT SCREW ADJUSTMENT”
section.
● Turn the throttle stop screw 1 until the
engine runs at the lowest possible speed.
To increase idle speed →
Turn the throttle stop screw 1 in a.
To decrease idle speed →
Turn the throttle stop screw 1 out b.
Engine idling speed:
1,700 ~ 1,900 r/min
VALVE CLEARANCE ADJUSTMENT
NOTE:
● The valve clearance should be adjusted
when the engine is cool to the touch.
● The piston must be at Top Dead Center
(T.D.C.) on compression stroke to check or
adjust the valve clearance.
1. Remove:
● Seat
● Fuel tank
Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section in the CHAPTER 4.
2. Remove:
● Carburetor
Refer to “CARBURETOR” section in
the CHAPTER 4.
● Spark plug cap
● Engine stay (upper)
● Cylinder head cover
Refer to “CAMSHAFTS” section in the
CHAPTER 4.
3. Remove:
● Timing plug 1
● Straight plug 2
● O-ring
1
2