Honda NSS250S Manual page 326

CYLINDER/PISTON
Measure the piston pin hole I.D.
SERVICE LIMIT: 17.04 mm (0.671 in)
Measure the piston pin O.D. at three points.
SERVICE LIMIT: 16.96 mm (0.668 in)
Calculate the piston-to-piston pin clearance.
SERVICE LIMIT: 0.02 mm (0.001 in)
CONNECTING ROD
Measure the connecting rod small end I.D.
SERVICE LIMIT: 17.05 mm (0.671 in)
Calculate the connecting rod-to-piston pin clear-
ance.
SERVICE LIMIT: 0.05 mm (0.002 in)
CYLINDER
Check the cylinder for warpage with a straight edge
and feeler gauge in the directions shown.
SERVICE LIMIT: 0.05 mm (0.002 in)
Inspect the cylinder bore for wear or damage.
Measure the cylinder I.D. in the X and Y axes at
three levels.
Take the maximum reading to determine the cylin-
der wear.
SERVICE LIMIT: 68.10 mm (2.681 in)
Calculate the taper and out-of-round at three levels
in the X and Y axes.
Take the maximum reading to determine both mea-
surements.
SERVICE LIMITS:
Taper:
Out of round: 0.05 mm (0.002 in)
10-6
maxiscooter-club.ru
0.05 mm (0.002 in)
PISTON
TOP
MIDDLE
BOTTOM
PISTON PIN
Y
X