Yamaha YXR70FX, Руководство по обслуживанию

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ENG
CYLINDER AND PISTON
2. Install:
• piston 1
• piston pin 2
• piston pin clips 3
TIP:
_
• Apply engine oil to the piston pin.
• Make sure the punch mark
a
on the piston
points towards the exhaust side of the cylin-
der.
• Before installing the piston pin clips, cover
the crankcase opening with a clean rag to
prevent the clips from falling into the crank-
case.
3. Install:
• cylinder gasket
• dowel pins
4. Lubricate:
• piston
• piston rings
• cylinder
(with the recommended lubricant)
Recommended lubricant
Engine oil
2
3
1
a
New
New
New
5. Offset:
• piston ring end gaps
a
Top ring
b
Upper oil ring rail
c
Oil ring expander
d
Lower oil ring rail
e
2nd ring
È
Exhaust side
e a
b d
c
120˚
120˚ 120˚
20 mm (0.79 in) 20 mm (0.79 in)
È