3 - 8
INSP
ADJ
IDLE SPEED ADJUSTMENT/
VALVE CLEARANCE ADJUSTMENT
IDLE SPEED ADJUSTMENT
1. Start the engine and thoroughly warm it
up.
2. Attach:
●
Inductive tachometer
To spark plug lead.
3. 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:
●
Air scoop (right)
1
●
Air filter case
2
2. Remove:
●
Spark plug
●
Tappet cover (intake side)
1
●
Tappet cover (exhaust side)
2
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
3. Remove:
●
Timing plug
1
●
Crankshaft end cover
2
●
O-rings
Summary of Contents for TT-R90(R)
Page 45: ...GEN INFO MEMO...
Page 55: ...GEN INFO MEMO...
Page 101: ...SPEC MEMO...
Page 269: ...ELEC MEMO...
Page 279: ...ELEC MEMO...
Page 287: ......
