Checking The Camshafts; Checking The Camshaft Sprockets; Checking The Rocker Arms And Rocker Arm Shafts - Yamaha XVS1300A 2007 Service Manual

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EAS23840

CHECKING THE CAMSHAFTS

1. Check:
• Camshaft lobes
Blue discoloration/pitting/scratches → Re-
place the camshaft.
2. Measure:
• Camshaft lobe dimensions "a" and "b"
Out of specification → Replace the camshaft.
Camshaft lobe dimensions
Intake A
42.988–43.088 mm (1.6924–
1.6964 in)
Limit
42.888 mm (1.6885 in)
Intake B
37.045–37.145 mm (1.4585–
1.4624 in)
Limit
36.945 mm (1.4545 in)
Exhaust A
43.156–43.256 mm (1.6991–
1.7030 in)
Limit
43.056 mm (1.6951 in)
Exhaust B
37.118–37.218 mm (1.4613–
1.4653 in)
Limit
37.018 mm (1.4574 in)
3. Check:
• Camshaft oil passage
Obstruction → Blow out with compressed air.
email: info@motomatrix.co.uk
EAS23870

CHECKING THE CAMSHAFT SPROCKETS

1. Check:
• Camshaft sprockets
More than 1/4 tooth wear "a" → Replace the
camshaft sprocket and the timing chain as a
set.
a. 1/4 tooth
b. Correct
1. Timing chain roller
2. Camshaft sprocket
EAS23880
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to all of the
rocker arms and rocker arm shafts.
1. Check:
• Rocker arm
• Rocker arm roller
Damage/wear → Replace.
2. Check:
• Rocker arm shaft
Blue discoloration/excessive wear/pit-
ting/scratches → Replace or check the lubri-
cation system.
3. Measure:
• Rocker arm inside diameter
Out of specification → Replace.
Rocker arm inside diameter
12.000–12.018 mm (0.4724–
0.4731 in)
5-16
CAMSHAFTS