4 - 74
ENG
CRANKCASE
EBS00332
SEPARATING THE CRANKCASE
1. Separate:
• left crankcase
• right crankcase
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a. Remove the crankcase bolts.
TIP:
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• Loosen each bolt 1/4 of a turn at a time and
after all the bolts are loosened, remove
them.
• Loosen the bolts in numerical order (see
numbers on the illustration).
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Right crankcase
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Left crankcase
b. Remove the right crankcase.
NOTICE
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Use a soft hammer to tap on one side of the
crankcase. Tap only on reinforced portions
of the crankcase. Do not tap on the crank-
case mating surfaces. Work slowly and
carefully. Make sure that the crankcase
halves separate evenly.
c. Remove the dowel pins.
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EBS00335
CHECKING THE TIMING CHAIN AND GUIDE
1. Check:
• timing chain
Cracks/stiff
→
Replace the timing chain and
camshaft sprocket as a set.
2. Check:
• intake side timing chain guide
Wear/damage
→
Replace.
CHECKING THE RELIEF VALVE
1. Check:
• spring seat
1
• spring
2
• relief valve body
3
• relief valve
4
Damage/wear
→
Replace the defective
part(s).
4
3
2
1
Содержание YXR70FX
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