Fantic XE 125 - Engine (XX 250 Version)

13 Motore1. General information
USE AND MAINTENANCE MANUAL CHAPTER 1
GENERAL INFORMATION2-Strokes - Edition 01 / 2023
36
Engine (XX 250 version)
Item Standard Limit
Cylinder head:
Combustion chamber volume:
– XX 250
Warp limit
-
–
–
0.03 mm (0.0012 in)
Cylinder:
Bore size 66.400–66.414 mm (2.6142–2.6147 in) 66.464 mm (2.6167 in)
Piston:
Piston size
Measuring point
(from bottom of piston skirt)
Piston clearance
66.345-66.355 mm (2.6120-2.6124 in)
25 mm (0.98 in)
0.040-0.060 mm (0.0016-0.0024 in)
–
–
–
Piston pin:
Pin hole internal diameter limit
Pin outer diameter limit
Piston pin - piston bore clearance
18.030 mm (0.7098 in)
17.985 mm (0.7081 in)
0.006-0.013 mm (0.0002-0.0005 in)
–
–
–
Piston ring:
Upper piston ring:
Lateral piston ring clearance
Second piston ring:
Lateral piston ring clearance
–
0.030–0.065 mm (0.0012–0.0026 in)
–
0.030–0.065 mm (0.0012–0.0026 in)
0.70 mm (0.0276 in)
0.10 mm (0.0039 in)
0.70 mm (0.0276 in)
0.10 mm (0.0039 in)
Crankshaft:
Crankshaft assembly width 59.95–60.00 mm (2.360–2.362 in) 0.050 mm (0.0020 in)
Clutch:
Clutch lever clearance
Friction plate thickness
Quantity
Clutch plate thickness
Quantity
Distortion limit
Clutch spring free length
Pushrod deformation limit
7.0–12.0 mm (0.28–0.47 in)
2.90–3.10 mm (0.114–0.122 in)
8
1.50–1.70 mm (0.059–0.067 in)
7
–
50.00 mm (1.97 in)
–
–
2.80 mm (0.110 in)
–
–
–
0.20 mm (0.008 in)
48.00 mm (1.89 in)
0.30 mm (0.012 in)
Transmission:
Main axle deflection limit
Drive axle deflection limit
–
–
0.01 mm (0.0004 in)
0.01 mm (0.0004 in)
Shifter:
Shifting type
Guide bar bending limit
Cam drum and guide bar
–
–
0.050 mm (0.0020 in)
Kickstarter type:
Kick clip friction force
Kick and mesh
P=7.80–11.80 N
(0.80–1.20 kg, 1.75–2.65 lb)
–
–
Air filter oil grade (oiled filter)
Foam air filter oil or
other quality foam air filter oil
–