Checking Timing Chain Guide - Yamaha T135SE Service Manual

CYLINDER HEAD
3. Measure:
9 cylinder head warpage
Out of specification → Resurface the cylin-
der head.
Maximum cylinder head warpage
0.03 mm (0.0012 in)
a. Place a straightedge
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.

CHECKING TIMING CHAIN GUIDE

1. Check:
9 timing chain guide (exhaust side)
Damage/wear → Replace.
4-12
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1 and a thickness