Honda 1988 Z50R Service Manual page 69

CY LI ND ER/ PISTON
Inspect the piston for wear or damage.
Measure the piston skirt diameter at 10 mm IDA in) from the bot-
tom and 90 ° to the piston pin bore .
SERVICE LIM IT : 38.90
mm
11 .532
in)
Compare this measurement against t he service limit and calcu -
late the piSlon -to-cv1inder clearance.
Refer to page 7 - 3 for measuring the cylinder.
Measure the piston pin bore I. D.
SERVICE LIMIT : 13. 10
mm
10.5 16 In)
Measure the pist on pin 0 .0.
SERVICE LIMIT: 12.98 mm 10.51 1 in)
Calculate the piston-Io-piston pin clearance .
SERVICE LIMIT: 0 .08
mm
(0 .003
in)
Measure the connecting rod small end 1 .0 .
SERVICE LIMIT: 13 .08
mm
10 .515
in)
Install each piston ring squarely into the cylinder and measure the
ring end gap.
NOTE
Push the rings
Int o
the cylinder wit h the top of the piston t o be
sure they are squarely in the cylinder.
SERV ICE LIMIT :
Top/second : 0 . 12 mm 10.005 inl
7-4