Yamaha MM600D, Service Manual

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5-9
ENG
2nd step:
•
Measure the piston skirt diameter (P) with a
micrometer.
a
MM600: 10 mm (0.39 in)
MM700: 15 mm (0.59 in)
from the bottom edge of the piston
Piston size (standard) (P):
MM600
64.930 ~ 64.935 mm
(2.5563 ~ 2.5565 in)
MM700
70.425 ~ 70.430 mm
(2.7726 ~ 2.7728 in)
•
If out of specification, replace the piston and
piston rings as a set.
3rd step:
•
Calculate the piston-to-cylinder clearance with
the following formula:
Piston-to-cylinder clearance =
Cylinder bore (C) – Piston skirt diameter (P)
•
If out of specification, rebore or replace cylin-
der, and replace piston and piston rings as a
set.
Piston-to-cylinder clearance:
MM600
0.065 ~ 0.070 mm
(0.0026 ~ 0.0028 in)
Limit 0.1 mm (0.004 in)
MM700
0.070 ~ 0.075 mm
(0.0028 ~ 0.0030 in)
Limit 0.1 mm (0.004 in)
SEJ5160
CYLINDER HEAD AND CYLINDER