Checking The Camshafts - Yamaha XV19SW Service Manual

1
EAS23860

CHECKING THE CAMSHAFTS

1. Check:
• Cam
Blue discoloration/pitting/scratches → Re-
place the camshaft.
2. Measure:
• Cam dimensions A "a" and B "b"
Out of specification → Replace the camshaft.
Camshaft lobe dimensions
Intake A
42.532–42.632 mm (1.6745–
1.6784 in)
Limit
42.432 mm (1.6705 in)
Intake B
35.950–36.050 mm (1.4154–
1.4193 in)
Limit
35.850 mm (1.4114 in)
Exhaust A
42.530–42.630 mm (1.6744–
1.6783 in) (cylinder #1)
42.531–42.631 mm (1.6744–
1.6784 in) (cylinder #2)
Limit
42.430 mm (1.6705 in) (cylinder
#1)
42.431 mm (1.6705 in) (cylinder
#2)
Exhaust B
35.950–36.050 mm (1.4154–
1.4193 in)
Limit
35.850 mm (1.4114 in)
2
3. Measure:
• Camshaft journal diameter (crankcase side)
"a"
Out of specification → Replace the camshaft.
4. Measure:
• Camshaft journal diameter (camshaft cover
side) "a"
Out of specification → Replace the camshaft.
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CAMSHAFTS
Camshaft journal diameter
(crankcase side)
24.957–24.980 mm (0.9826–
0.9835 in)
a
Camshaft journal diameter (cam-
shaft cover side)
27.957–27.980 mm (1.1007–
1.1016 in)
a