Calculating The Piston-To-Cylinder Clearance; Checking The Piston Pin - Yamaha F6Z Service Manual

CRANKSHAFT, PISTON AND CYLINDER BODY
NOTE:
When measuring the piston diameter,
position the micrometer in relation to the
piston pin hole as shown.
2. Measure:
Piston pin boss inside diameter


(with a micrometer)
Out of specification
piston.
Piston pin boss inside diameter:
14.004 - 14.015 mm
(0.5513 - 0.5518 in)
CALCULATING THE PISTON-TO-
CYLINDER CLEARANCE
Calculate:
Piston-to-cylinder clearance


Out of specification
piston and piston rings, the cylinder
or both.
Piston-to-
cylinder =
clearance
Piston-to-cylinder clearance
0.035 - 0.065 mm
(0.0014 - 0.0026 in)

CHECKING THE PISTON PIN

Measure:
Piston pin outside diameter


Out of specification
piston pin.
Piston pin outside diameter:
13.996 - 14.000 mm
(0.5510 - 0.5512 in)
5-49
Replace the

a
Replace the

Cylinder
Piston
bore –
diameter
diameter
a
Replace the

: