Valve Clearance Inspection And Adjustment; And Side Covers - Yamaha TT-R125(W) Owner's Service Manual

VALVE CLEARANCE INSPECTION AND ADJUSTMENT

Adjustment steps:
Adjust the pilot air screw.
G
Refer to "PILOT AIR SCREW ADJUST-
MENT" section.
Turn the throttle stop screw 1 until the
G
specified engine idling speed.
To increase idling speed →
Turn the throttle stop screw 1 in a.
To decrease idling speed →
Turn the throttle stop screw 1 out b.
Inductive tachometer:
YU-8036-B/90890-03113
Engine idling speed:
1,300 ~ 1,500 r/min
VALVE CLEARANCE INSPECTION AND
ADJUSTMENT
NOTE:
The valve clearance should be adjusted
G
when the engine is cool to the touch.
The piston must be at Top Dead Center
G
(T.D.C.) on compression stroke to check or
adjust the valve clearance.
1. Remove:
Seat
G
Fuel tank
G
Refer to "SEAT, FUEL TANK AND SIDE
COVERS" section in the CHAPTER 4.
2. Remove:
Spark plug
G
Intake tappet cover 1
G
Exhaust tappet cover 2
G
O-ring
G
3. Remove:
Timing mark accessing screw 1
G
Crankshaft end accessing screw 2
G
O-ring
G
3 - 11
INSP
ADJ