VALVES AND VALVE SPRINGS
6-28
g. Apply Mechanic’s blueing dye (Dykem) “b” onto the valve face.
h. Install the valve into the cylinder head.
i. Press the valve through the valve guide and onto the valve seat to make a clear impres-
sion.
j. Measure the valve seat contact width “c” again. If the valve seat contact width is out of
specification, reface and lap the valve seat.
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EAS2GC1253CHECKING THE VALVE SPRINGS
1. Measure:
• Valve spring free length “a”Out of specification Replace the valve
spring. 2. Measure:
• Compressed valve spring force “a”
Out of specification Replace the valve
spring.
3. Measure: • Valve spring tilt “a”Out of specification Replace the valve
spring.
Free length (intake)
40.76 mm (1.60 in)
Limit 38.72 mm (1.52 in)
Free length (exhaust) 36.94 mm (1.45 in)
Limit 35.09 mm (1.38 in)
b. Installed length
Installed compression spring
force (intake) 178.00–204.00 N (18.15–20.80
kgf, 40.01–45.86 lbf)
Installed compression spring
force (exhaust) 124.00–142.00 N (12.64–14.48
kgf, 27.88–31.92 lbf)
Installed length (intake) 34.78 mm (1.37 in)
Installed length (exhaust) 30.83 mm (1.21 in)
Spring tilt (intake) 2.5 °/1.8 mm (2.5 °/0.07 in)
Spring tilt (exhaust) 2.5 °/1.6 mm (2.5 °/0.06 in)
CRANKSHAFT ASSEMBLY AND BALANCER SHAFT
6-75
EAS2GC1318REMOVING THE BALANCER SHAFT
1. Remove:• Balancer shaft “1”
TIP
Remove the balancer shaft with its flat side “a”
facing the crankshaft.
EAS2GC1319REMOVING THE CRANKSHAFT ASSEMBLY
1. Remove:• Crankshaft assembly “1”
TIP
Remove the crankshaft assembly by using the
crankcase separating tool “2”.
EAS2GC1320CHECKING THE CRANKSHAFT ASSEMBLY
1. Measure:• Crankshaft runoutOut of specification Replace the crank-
shaft, bearing or both.
TIP
Turn the crankshaft slowly.
2. Measure: • Big end side clearance “a”Out of specification Replace the big end
bearing, crankshaft pin, or connecting rod.
3. Measure: • Crank assembly width “a”Out of specification Replace the crank-
shaft.
Crankcase separating tool
90890-04152
YU-A9642
1
a
2
1
Runout limit 0.030 mm (0.0012 in)
Big end side clearance 0.150–0.450 mm (0.0059–0.0177
in)
Crank assembly width 61.93–62.00 mm (2.438–2.441 in)
