Fantic XE 125 - Segments Check (XX 250 Version); Segments Check (XX 125; XE 125 Versions)

4. Maintenance
USE AND MAINTENANCE MANUAL CHAPTER 4
MAINTENANCE2-Strokes - Edition 00 / 2023
121
4
Segments check (XX 250 version)
– Remove carbon deposits from the segments and their
grooves.
– Using a thickness gauge, measure the lateral clearance of
the segments.
Standard Limit
First segment
lateral clearance
0.030–0.065 mm
(0.0012–0.0026 in)
0.100 mm
(0.0039 in)
Second segment
lateral clearance
0.030–0.065 mm
(0.0012–0.0026 in)
0.100 mm
(0.0039 in)
– Insert one segment at a time into the cylinder, using the
crown of the piston to position and level the segment at
the bottom of the cylinder (zone where wear is minimal).
– Measure the clearance between the ends of the segments,
if it is not in accordance with the specifications replace the
segments all together.
Standard Limit
Distance between
ends of piston rings
(installed)
0.700 mm
(0.0276 in)
Segments check (XX 125 / XE 125 versions)
– Remove carbon deposits from the segment and its groove.
– Using a thickness gauge, measure the lateral clearance of
the segment.
Standard Limit
Lateral segment
clearance
0.035–0.070 mm
(0.0014–0.0028 in)
0.100 mm
(0.0039 in)
– Insert the segment into the cylinder, using the crown of the
piston to position and level the segment at the bottom of
the cylinder (zone where wear is minimal).
– Measure the clearance between the ends of the segment,
replace if not in accordance with specifications.
Standard Limit
Distance between
ends of piston ring
(installed)
1.20 mm
(0.0472 in)