Yamaha MBK YQ100, Руководство по обслуживанию

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ENG
4-9
• If out of specification, rebore or replace
cylinder, and replace piston and piston rings
as a set.
2nd step:
• Measure the piston skirt diameter “p” with a
micrometer.
a 10 mm from the piston bottom edge.
Piston size P
51.958~51.967 mm
52.52 mm
52.50 mm Standard
Oversize 1
Oversize 2
• If out of specification, replace piston and
piston rings as a set.
3rd step:
• Calculate the piston-to cylinder clearance
with 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:
0.044 ~ 0.045mm
Limit : 0.1 mm
Standard Wear limit
C = Maximum D
T=( Maximum D1 or D2 ) - ( Maximum D5 or
D6 )
R=( Maximum D1 D3 or D5 ) - ( Maximum
D2 D4 or D6 )
Cylinder bore
“C”
Taper “T”
Out of round
“R”
52.002~52.012mm
–
–
52.10 mm
0.05 mm
0.03 mm
a
CYLINDER HEAD, CYLINDER, PISTON
D
1
D
2
D
3
D
4
D
5
D
6