Yamaha YXR70FX, Руководство по обслуживанию

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ENG
CYLINDER HEAD
EBS00220
REMOVING THE CYLINDER HEAD
1. Align:
• “I” mark on the AC magneto rotor
(with the stationary pointer on the AC mag-
neto cover)
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a. Turn the crankshaft counterclockwise.
b. When the piston is at the top dead center
(TDC) on the compression stroke, align the
“I” mark
a
on the AC magneto rotor with
the stationary pointer
b
on the AC magneto
cover.
TIP:
To position the piston at top dead center (TDC)
on the compression stroke, align the “I” mark
c
on the camshaft sprocket with the stationary
pointer
d
on the cylinder head, as shown in
the illustration.
▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲
a
b
d
c
2. Loosen:
• camshaft sprocket bolts
1
• decompressor assembly bolts
2
TIP:
While holding the AC magneto rotor nut with a
wrench, loosen the camshaft sprocket bolts
and decompressor assembly bolts.
3. Loosen:
• timing chain tensioner cap bolt
4. Remove:
• timing chain tensioner
(along with the gasket)
• camshaft sprocket
• timing chain
TIP:
_
To prevent the timing chain from falling into the
crankcase, fasten it with a wire.
1
2