IDLE SPEED ADJUSTMENT/ VALVE CLEARANCE ADJUSTMENT

INSP

ADJ

IDLE SPEED ADJUSTMENT

1.Start the engine and thoroughly warm it up.

2.Attach:

●Inductive tachometer To spark plug lead.

3.Adjust:

●Idle speed

Adjustment steps:

●Adjust the pilot screw.

Refer to “PILOT AIR SCREW ADJUST- MENT” 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.

Inductive tachometer:

YU-8036-B/90890-03113

Engine idling speed: 1,400 ~ 1,600 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:

●Air scoop (right) 1

●Air filter case 2

2.Remove:

●Spark plug

●Tappet cover (intake side) 1

●Tappet cover (exhaust side) 2

3.Remove:

●Timing plug 1

●Crankshaft end cover 2

●O-rings

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