Yamaha SX150C Service Manual page 135

POWR
CYLINDER BODY ASSEMBLY
5440
INSPECTING THE PISTONS
Measure:
• Piston diameter
(with a micrometer)
Out of specification → Replace.
Measuring
point "H"
10 mm
Standard
(0.4 in)
Oversize piston diameter
Cylinder #1
1st oversize*
90.11 mm (3.548 in)
2nd oversize
90.36 mm (3.557 in)
Cylinders #2 - #6
1st oversize*
90.15 mm (3.549 in)
2nd oversize
90.40 mm (3.559 in)
*: Except for USA
NOTE:
When measuring the piston diameter, posi-
tion the micrometer in relation to the piston
pin hole as shown.
5-48
E
5
Piston diameter
Cylinder #1
89.845 - 89.869 mm
(3.5372 - 3.5381 in)
Cylinders #2 - #6
89.895 - 89.915 mm
(3.5392 - 3.5400 in)