Cylinder; Piston - HYOSUNG WOW 50 Service Manual

CYLINDER

Decarbon exhaust port and upper part of the cylinder,
taking care not to damage the cylinder wall surface.
The wear of the cylinder wall is determined from diame-
ter reading taken at 20mm from the top of the cylinder
with a cylinder gauge. If the wear thus determined
exceeds the limit indicated below, rework the bore to the
next oversize by using a boring machine or replace the
cylinder with a new one.
Cylinder bore
Cylinder gauge set : 09900-20508
After reworking the bore to an oversize, be sure to
chamfer the edges of ports and smooth the chamfered
edges with emery paper. To chamfer, use a scraper,
taking care not to nick the wall surface.

PISTON

■ CYLINDER TO PISTON CLEARANCE
Cylinder-to-piston clearance is the difference between
piston diameter and cylinder bore diameter. Be sure to
take the maked diameter at right angles to the piston
pin. The value of elevation � is prescribed to be 15mm
from the skirt end.
Micrometer(20 ~ 50mm) : 09900-20202
Piston diameter
Service limit
41.070 mm (1.617 in)
Service limit
40.885 mm (1.610 in)
ENGINE 3-20