Yamaha Rhino 450 YXR45FAV, Service Manual

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ENG
CYLINDER AND PISTON
d. If out of specification, replace the piston.
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Piston pin-to-piston clearance
0.004 ~ 0.024 mm
(0.00016 ~ 0.00094 in)
<Limit>: 0.074 mm (0.0029 in)
INSTALLING THE PISTON
1. Install:
• piston rings
(onto the piston)
NOTE:
• Be sure to install the piston rings so that the
manufacturer’s marks or numbers are
located on the upper side of the rings.
• Lubricate the piston and piston rings liberally
with engine oil.
2. Position:
• top ring
• 2nd ring
• oil ring
Offset the piston ring end gaps as shown.
a
Top ring end
b
Oil ring end (upper rail)
c
Oil ring end (lower rail)
d
2nd ring end
e
20 mm (0.79 in)
3. Install:
• piston
1
• piston pin
2
• piston pin clips
3
NOTE:
• Apply engine oil onto the piston pin, piston
rings and piston.
• Be sure that the arrow mark
a
on the piston
points to the exhaust side of the engine.
• Before installing the piston pin clips, cover
the crankcase with a clean rag to prevent
them piston pin clip from falling into the
crankcase.
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