Checking Timing Chain Guide - Yamaha T135SE Service Manual

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Yamaha T135 Service Manual
4-12
CYLINDER HEAD
3. Measure:
9cylinder head warpage
Out of specification → Resurface the cylin-
der head.
Maximum cylinder head warpage
0.03 mm (0.0012 in)
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a. Place a straightedge 1 and a thickness
gauge 2 across the cylinder head.
b. Measure the warpage.
c. If the limit is exceeded, resurface the cylin-
der head as follows.
d. Place a 400 ~ 600 grit wet sandpaper on
the surface plate and resurface the cylinder
head using a figure-eight sanding pattern.
NOTE:
To ensure an even surface, rotate the cylinder
head several times.
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CHECKING TIMING CHAIN GUIDE

1. Check:
9timing chain guide (exhaust side)
Damage/wear → Replace.
ENG