Checking The Piston Rings - Yamaha FZ-16 Service Manual

"C" = maximum of D1-D2
"T" = maximum of D1 or D2 - D5 or D6 maximum
"R" = maximum of D1, D3 or D5 - minimum of D2,
D 4 or D6
b.
If out of specification, replace the
cylinder, piston and piston rings, as
a whole.
c.
Measure the diameter of the piston skirt "D"
"A" with the micrometer.
b. 5.0 mm (0.20 in) from the lower edge
piston
Piston
Diameter D
53970-53985 mm
d.
If out of specification, replace the
piston and piston rings as a whole.
e.
Calculate the piston-cylinder clearance with the
following formula.
•
Piston-cylinder clearance = Diameter
Cylinder "C" - Piston skirt diameter "D"
Piston-cylinder clearance
0020-0035
Limit
0.15 mm
f. If out of specification, replace the
cylinder, piston and piston rings, as
a whole.

CHECKING THE PISTON RINGS

1.
Measure:
•
Ring side clearance
Out of specification Replace the piston
and piston rings, as a whole.
NOTE:
Before measuring the slack side of the ring,
remove carbon deposits from the slots
piston and rings.
Piston ring
Top Ring
Ring side clearance
0030-0065 mm
Limit
0.100 mm
Second ring
Ring side clearance
0020-0055 mm
Limit
0.100 mm
2.
Install:
•
Piston Ring
(Inside the cylinder)
NOTE:
Level the piston ring into the cylinder with the
piston head.
a. 40mm
5-23
CYLINDER AND PISTON