Valve, Valve Guide, And Valve Seat - Yamaha XC125 Service Manual

E.o NSPECTONANO.
6. Measu re:
• Cylinder head warpage
Out of specification -+ Resurface/Re-
_ __=_- place.
,_ : c_ _ Less than 0.05 mm 10.002 in)
_) /,.fj__ VALVE, VALVE GUIDE, AND VALVE SEAT
Intake and Exhaust Valve
1. Check:
_______________ ® Valve face
® Stem end
I _ Wear/Pitting/Out of specification -+ Re-
--=- (_) -=- place.
45°
_--_ _--_ Margin Thickness (Service limit, (_ :
__ __ Intake 0.3 mm (0.012 in)
Exhaust 0.7 mm (0.027 in)
Beveled (_) : 0.25 mm (0.010 in)
Minimum Length (Service limit) _ :
4.5 mm (0.177 in)
2. Measure:
• Valve stem clearance (Cold)
Use Micrometer (_) and Bore Gauge (_.
_____ I ValveValveOUt of specification -* Replace either IStemand/orClearanceguide. = rB] -- []
_L_ _ Valve Stem. Clearance Maximum
(_)_ 0.010 ~ 0.037 mm 0.08 mm
Intake (0.0004 ~ 0.0015 in) (0.0031 in)
0.025 ~ 0.052 mm 0.10 mm
Exhaust (0.0010 ~ 0.0020 in) (0.0039 in)
@ Valve (_ Valve guide
[] VALVE STEM OUTSIDE DIAMETER
[] VALVE GUIDE INSIDE DIAMETER
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