Yamaha Star XVS13AA(C) 2011, Service Manual

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CAMSHAFTS
5-25
4. Measure:
• Rocker arm shaft outside diameter “a”
Out of specification
→
Replace.
5. Calculate:
• Rocker-arm-to-rocker-arm-shaft clearance
TIP
Calculate the clearance by subtracting the rock-
er arm shaft outside diameter from the rocker
arm inside diameter.
Out of specification
→
Replace the defective
part(s).
EAS23970
CHECKING THE TIMING CHAIN
TENSIONERS
The following procedure applies to all of the tim-
ing chain tensioners.
1. Disassemble:
• Timing chain tensioner
TIP
Squeeze timing chain tensioner clip 2 “5”, and
then remove the timing chain tensioner springs
and timing chain tensioner rod.
2. Check:
• Timing chain tensioner housing
• Timing chain tensioner rod
• Timing chain tensioner spring seat
• Timing chain tensioner springs
• Timing chain tensioner clips
Damage/wear
→
Replace the as a set.
3. Assemble:
• Timing chain tensioner
TIP
Prior to installing the timing chain tensioner rod,
drain the engine oil from the timing chain ten-
sioner housing.
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Install the timing chain tensioner outer spring,
timing chain tensioner clip 2 “1”, and clip 1 “2”.
TIP
Be sure to face the ends of timing chain tension-
er clip 2 “1” in the direction shown in the illustra-
tion and to fit timing chain tensioner clip 1 “2” in
the groove “a” in the timing chain tensioner
housing.
Rocker arm shaft outside diame-
ter
11.976–11.991 mm (0.4715–
0.4721 in)
Rocker-arm-to-rocker-arm-shaft
clearance
0.009–0.042 mm (0.0004–0.0017
in)
Limit
0.095 mm (0.0037 in)
1. Timing chain tensioner rod
2. Timing chain tensioner spring seat
3. Timing chain tensioner inner spring
4. Timing chain tensioner clip 1
5. Timing chain tensioner clip 2
6. Timing chain tensioner outer spring
7. Timing chain tensioner housing
1
2
3
5
4
6
7
1
a
2