4 - 15
ENG
CYLINDER HEAD
5. Remove:
• cylinder head
TIP:
_
• Loosen the bolts in the proper sequence as
shown.
• Loosen each bolt 1/2 of a turn at a time. After
all of the bolts are fully loosened, remove
them.
6
8
5
7
2
1
4
3
EBS00224
CHECKING THE CAMSHAFT SPROCKET
1. Check:
• camshaft sprocket
Wear/damage
→
Replace the camshaft
sprocket and timing chain as a set.
a
1/4 of a tooth
b
Correct
1
Roller
2
Sprocket
EBS00227
CHECKING THE TAPPET COVERS
1. Check:
• tappet covers
• camshaft sprocket cover
Cracks/damage
→
Replace.
EBS00229
CHECKING THE TIMING CHAIN
TENSIONER
1. Check:
• timing chain tensioner
Cracks/damage
→
Replace.
2. Check:
• one-way cam operation
Rough movement
→
Replace the timing
chain tensioner.
3. Check:
• timing chain tensioner cap bolt
• spring
• one-way cam
• timing chain tensioner rod
Damage/wear
→
Replace the defective
part(s).
Содержание YXR70FX
Страница 1: ...SERVICE MANUAL 2008 LIT 11616 21 58 5B4 F8197 10 YXR70FX...
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Страница 46: ...2 11 SPEC ENGINE SPECIFICATIONS Cylinder head tightening sequence 6 8 5 7 2 1 4 3...
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Страница 496: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN PRINTED IN U S A...