Yamaha MM700F, Руководство по обслуживанию

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5-11
ENG
2nd step:
•
Measure the piston skirt diameter (P) with a
micrometer.
a
15 mm (0.59 in) from the bottom edge of the piston
Piston size (standard) (P):
70.427 ~ 70.430 mm
(2.7727 ~ 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 cylinder,
and replace piston and piston rings as a set.
Piston-to-cylinder clearance:
0.070 ~ 0.075 mm
(0.0028 ~ 0.0030 in)
Limit 0.15 mm (0.006 in)
9. Measure:
•
Side clearance (piston rings)
Use the thickness gauge 1 .
Out of specification
→
Replace the piston
and/or rings.
NOTE:
Eliminate the carbon deposits from the piston ring
grooves and rings before measuring the side clear-
ance.
Side clearance (top):
0.02 ~ 0.06 mm
(0.0008 ~ 0.0024 in)
Side clearance (2nd):
0.02 ~ 0.06 mm
(0.0008 ~ 0.0024 in)
SCH5190
CYLINDER HEAD AND CYLINDER
SCH5200