TOHATSU MX 50D2 Service Manual page 242

Power Unit
5-64
4.
c
d
5.
Inspection of Piston Ring Side Clearance
1) Attach a piston ring to piston, and measure piston ring
side clearance. Replace piston ring if the clearance is
over specified value.
Piston Ring Tool :
P/N. 353-72249-0
Piston Ring Side Clearance :
Standard Value :
Top Ring
Second Ring
Functional Limit :
c Top Ring
d Second Ring
Inspection of Piston Pin Hole
Measure piston pin hole inner diameter, and replace
piston if the inner diameter is over the limit.
Piston Pin Hole : Standard Value
17.55 mm (0.6909 in)
GB
}
0.04 - 0.08 mm
(0.0016 - 0.0032 in)
}
0.10 mm
(0.0039 in)
2st X50D2 2011