Cylinder Inspection - KSR Moto T58 - ZION 125 Repair Manual

ENGINE
4. Measure the clearance between the piston ring (1) and the
piston ring groove (2).
Allowable limits: Upper ring:
Second ring: 0.10 mm
PISTON INSTALLATION
1. Install the "IN" mark (1) on the top of the piston toward the air
intake.
2. Install the piston pin and the C-type piston pin clip.
NOTE
Don´t trop anything in the crankcase.
It is recommended to secure the crancase with a rag.

CYLINDER INSPECTION

1. Check scratch and abrasion on the inner walls of the cylinder.
2. Measure the inner diameter of the cylinder from three posi-
tions (the upper, middle and bottom (A)) with the right angle
against the piston pin as shown in picture (1).
Allowable limits(A): 52.413 mm
3. Measure the clearance between the cylinder and the piston
Allowable limit: 0.053 mm
4. Measure the roundness of the inner walls of the cylinder (the
diameter difference between the X and Y dimensions).
Allowable limits: 0.005 mm
5. Measure the cylinder degree of the inner walls of the cylinder
(the diameter differences between the X and Y dimension on
the upper, bottom and the middle positions(B).
Allowable limits (B): 0.004 mm
70
0.10 mm
2
1
1
A
1
B