Panterra Fusion Service Manual page 95

92
8. Cylinder and Piston
6. Measure the OD of the piston pin.
Maximum service allowance:
Replace when it is below 12.96 mm, (.51 in.).
7. Measure the OD of the piston.
Attention:
Measure it in a position which forms 90 degree with
the center of the piston pin and which is 9mm away
from the skirt.
Maximum service allowance:
Replace when it is below 38.7 mm (1.52 in.).
8. Measure the clearance between the piston pin and the pin
hole.
Maximum service allowance:
Replace when it goes beyond 0.02 mm (.0008 in.).
Checking the Cylinder
1. Check whether it's scratched, worn or damaged in its inner
surface.
2. Measure its ID in three positions (upper, middle and lower)
which form 90 degrees (x-y direction) with the piston hole.
Maximum service allowance:
Repair or replace when it goes beyond 0.1mm (.004 in.).
The difference between X and Y directions is
out-of-roundness.
The cylindricity is the ID difference (between X and Y
directions), measuring at three positions (upper, middle and
lower). The largest measured value will be considered the
result. This indicates a taper of the cylinder.
Maximum service allowance:
Out-of-roundness:
Repair or replace when it goes beyond 0.05mm (.002 in.).
Cylindricity:
Repair or replace when it goes beyond 0.05mm (.002 in.).
NIKOTA USA: PANTERRA SCOOTER SERVICE MANUAL
6
7
2
8-5
PISTON PIN
Y
IN
UPPER
X
MIDDLE
LOWER
CHAPTER 8: CYLINDER AND PISTON
EX