1. General information
USE AND MAINTENANCE MANUAL
CHAPTER 1
GENERAL INFORMATION
4-Strokes - Edition 00 / 2022
47
1
Motore (XXF 450 / XEF 450 versions)
Elemento
Standard
Limite
Cylinder head:
Warp limit
–
0.05 mm (0.0020 in)
Cylinder:
Bore size
97.000–97.010 mm (3.8189–3.8193 in)
97.060 mm (3.8213 in)
Camshaft:
Camshaft cap inside diameter
Camshaft journal diameter
Camshaft-journal-to-camshaft-cap clearance
Camshaft lobe dimensions:
Lobe height (Intake)
Lobe height (Exhaust)
Camshaft runout limit
22.000–22.021 mm (0.8861–0.8670 in)
21.959–21.972 mm (0.8645–0.8650 in)
0.028–0.062 mm (0.0011–0.0024 in)
–
–
–
–
–
–
38.030 mm (1.4972 in)
34.170 mm (1.3453 in)
0.030 mm (0.0012 in)
Valve, valve seat, valve guide:
Valve clearance (cold):
Intake
Exhaust
Valve dimensions:
Valve seat contact width (intake)
Valve seat contact width (exhaust)
Valve stem diameter (intake)
Valve stem diameter (exhaust)
Valve guide inside diameter (intake)
Valve guide inside diameter (exhaust)
Valve-stem-to-valve-guide clearance (intake)
Valve-stem-to-valve-guide clearance (exhaust)
Valve stem runout
0.10–0.17 mm (0.0039–0.0067 in)
0.15–0.22 mm (0.0059–0.0087 in)
–
–
–
–
5.500–5.512 mm (0.2165–0.2170 in)
5.500–5.512 mm (0.2165–0.2170 in)
–
–
–
–
–
1.5 mm (0.06 in)
1.5 mm (0.06 in)
5.445 mm (0.2144 in)
5.435 mm (0.2140 in)
–
–
0.080 mm (0.0032 in)
0.100 mm (0.0039 in)
0.020 mm (0.0008 in)
Valve spring:
Free length (intake)
Free length (exhaust)
–
–
36.65 mm (1.44 in)
35.55 mm (1.40 in)
Piston:
Piston-to-cylinder clearance
Diameter
Measuring point (from piston skirt bottom)
0.010–0.045 mm (0.0004–0.0018 in)
96.955–96.970 mm (3.8171–3.8177 in)
9.0 mm (0.35 in)
–
–
–
Piston pin:
Piston pin bore inside diameter
Piston pin outside diameter
Piston-pin-to-piston-pin-bore clearance
–
–
0.004–0.024 mm (0.0002–0.0009 in)
18.045 mm (0.7104 in)
17.981 mm (0.7079 in)
–
Piston ring (top ring):
End gap (installed)
Ring side clearance (installed)
–
0.015–0.065 mm (0.0006–0.0026 in)
0.55 mm (0.0217 in)
0.120 mm (0.0047 in)
Piston ring (second piston ring):
End gap (installed)
Ring side clearance (installed)
–
0.020–0.060 mm (0.0008–0.0024 in)
0.85 mm (0.0335 in)
0.100 mm (0.0039 in)
Crankshaft:
Crank assembly width
Runout limit
61.93–62.00 mm (2.438–2.441 in)
–
–
0.030 mm (0.0012 in)