Yamaha 2007 XP500 Service Manual page 242

NOTE:
Be sure to install the top and 2nd rings so that
the manufacturers marks or numbers face up.
2. Install:
Piston
G
Piston pin
G
Piston pin clips
New
G
NOTE:
Apply engine oil onto the piston pin.
G
Make sure the arrow mark "a" on the piston
G
points towards the exhaust side of the engine.
Before installing the piston pin clip, cover the
G
crankcase opening with a clean rag to prevent
the piston pin clip from falling into the crank-
case.
3. Install:
Gasket "1" New
G
Dowel pins
G
4. Lubricate:
Piston
G
Piston rings
G
CYLINDER AND PISTONS
Cylinder
G
(with the recommended lubricant)
Recommended lubricant
Engine oil
5. Offset:
Top ring
G
2nd ring
G
Oil ring
G
Offset the piston ring end gaps as shown.
a. Top ring end
b. Upper oil ring rail end
c. Oil ring expander end
d. Lower oil ring rail end
e. 2nd ring end
f. 20 mm (0.79 in)
6. Install:
Cylinder
G
Timing chain guide (exhaust side)
G
NOTE:
Pass the timing chain through the timing chain
cavity.
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