Yamaha YZ450F(S), Руководство по эксплуатации для владельца

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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
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
●
Engine stay (upper)
●
Cylinder head cover
Refer to “CAMSHAFTS” section in the
CHAPTER 4.
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.
NOTE:
Using a digital engine tachometer for idle
speed adjustment, detect the engine idling
speed by bringing the sensing element
c
of
the engine tachometer close to the ignition
coil
2 .
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:
1,900 ~ 2,100 r/min
c
2