Fantic XE 125 - Piston and Cylinder Combination; Checking the Piston and Cylinder Combination

4. Maintenance
USE AND MAINTENANCE MANUAL CHAPTER 4
MAINTENANCE2-Strokes - Edition 00 / 2023
120
A
B
Piston and cylinder combination
PISTON CLEARANCE =
CYLINDER BORE –
PISTON DIAMETER.
– If the piston clearance does not meet specifications,
replace the piston with piston ring and/or cylinder.
Standard Limit
Piston clearance
0.040–0.045 mm
(0.0016–0.0018 in)
(XX 125 / XE 125 versions)
0.100 mm
(0.0039 in)
0.040-0.060 mm
(0.0016-0.0024 in)
(XX 250 versione)
Checking the piston and cylinder combination
– Check the notch on cylinder “A”:
– Check the notch on piston “B”:
– Combine piston and cylinder according to the table below:
(XX 125 / XE 125 versions)
Cylinder mark Piston mark
(color)
A A (red)
B B (orange)
C C (green)
D D (purple)
(XX 250 version)
Cylinder mark Piston mark
(color)
A
B (orange)
B
C
C (green)
D
When you purchase a cylinder, you cannot designate
its size. Choose the piston that matches the above
chart.