Yamaha XC200T Service Manual page 77

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10. Clean/Assembly:
+All cylinder head parts.
11. Apply:
+Solvent (_
Into each intake and exhaust port.
NOTE:
Pour solvent into intake and exhaust ports only
after completion of all valve work and assembly
of all head parts.
12. Check:
eValve seat to valve face seal (_
Leakage past valve seat_Relap.
(See procedure below)
Relapping steps:
oDisassemble head parts.
eRepeat lapping steps using fine lapping
compound.
+Clean all parts thoroughly.
+Reassemble and check for leakage again us-
ing solvent.
oRepeat steps as often as necessary to achieve
a satisfactory seal.
_ Valve Spring
1. Measure:
+Spring free length
i ,. Out of specification-_Replace.
_ Minimum Free Length:
Inner Spring:
(in) 35.5 mm (1.4 in)
(Exh) 35.5 mm (1.4 in)
Outer Spring:
(In) 37.2 mm (1.46 in)
(Exh) 37.2 mm (1.46 in)
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