Valve, Valve Guide, Valve Seats And Valve Spring - Yamaha YX600S Service Manual

INSPECTION AND REPAIR
ENG
I
\,~I
302-029
5. Measure:
•Warpage
Exceeds allowable limit- Resurface.
Cylinder Head Warpage:
Less than 0.03 mm (0.0012 in)
Allowable Limit:
0.25 mm (0.010 in)
VALVE, VALVE GUIDE, VALVE SEATS
AND VALVE SPRING
1. Measure:
•Valve stem clearance
Valve Stem Clearance=
Valve Guide Inside Diameter
G)
- Valve Stem Diameter
@
Out of specification- Replace valve or
guide.
Valve Stem Clearance
Maximum
Intake
Exhaust
@Bore gauge
2. Measure:
0.010-0.037 mm
(0.0004- 0.0015
in)
0.025-0.052
mm
(0.0010- 0.0020
in)
•Valve face
Pitting/Wear- Regrind.
Out of specification-Replace.
Minimum Thickness
(Service Limit)
G):
0.7 mm (0.0276 in)
0.10
mm
(0.004 in)
0.12
mm
(0.005
in)
Beveled
@:
0.5 mm (0.020 in)
Minimum Length
(Service Limit)
@:
4.0 mm (0.157 in)
3-18