1. General information
USE AND MAINTENANCE MANUAL
CHAPTER 1
GENERAL INFORMATION
XEF 250 - Rev01 / 2020
23
1
1.10 MAINTENANCE LIMITS
Engine
Item
Standard
Limit
Cylinder head:
Warp limit
–
0.05 mm (0.0020 in)
Cylinder:
Bore size
77.000–77.010 mm (3.0315–3.0319 in)
77.060 mm (3.0339 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)
32.230–32.330 mm (1.2689–1.2728 in)
33.850–33.950 mm (1.3327–1.3366 in)
–
–
–
0.080 mm (0.0032 in)
32.130 mm (1.2650 in)
33.750 mm (1.3287 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
0.12–0.19 mm (0.0047–0.0075 in)
0.17–0.24 mm (0.0067–0.0094 in)
0.90–1.10 mm (0.0354–0.0433 in)
0.90–1.10 mm (0.0354–0.0433 in)
4.975–4.990 mm (0.1959–0.1965 in)
4.460–4.475 mm (0.1756–0.1762 in)
5.000–5.012 mm (0.1969–0.1973 in)
4.500–4.512 mm (0.1772–0.1776 in)
0.010–0.037 mm (0.0004–0.0015 in)
0.025–0.052 mm (0.0010–0.0020 in)
–
–
–
1.6 mm (0.06 in)
1.6 mm (0.06 in)
4.945 mm (0.1947 in)
4.430 mm (0.1744 in)
–
–
0.080 mm (0.0032 in)
0.100 mm (0.0039 in)
0.010 mm (0.0004 in)
Valve spring:
Free length (intake)
Free length (exhaust)
36.78 mm (1.45 in)
35.60 mm (1.40 in)
34.94 mm (1.38 in)
33.82 mm (1.33 in)
Piston:
Piston-to-cylinder clearance
Diameter
Measuring point (from piston skirt bottom)
0.030–0.055 mm (0.0012–0.0022 in)
76.955–76.970 mm (3.0297–3.0303 in)
4.0 mm (0.16 in)
–
–
–
Piston pin:
Piston pin bore inside diameter
Piston pin outside diameter
Piston-pin-to-piston-pin-bore clearance
16.002–16.013 mm (0.6300–0.6304 in)
15.991–16.000 mm (0.6296–0.6299 in)
0.002–0.022 mm (0.0001–0.0009 in)
16.043 mm (0.6316 in)
15.971 mm (0.6288 in)
–
Piston ring (top ring):
End gap (installed)
Ring side clearance (installed)
0.15–0.25 mm (0.0059–0.0098 in)
0.030–0.065 mm (0.0012–0.0026 in)
0.50 mm (0.0197 in)
0.115 mm (0.0045 in)
Crankshaft:
Crank assembly width
Runout limit
55.93–56.00 mm (2.202–2.205 in)
–
–
0.030 mm (0.0012 in)
