5.2 Intake Pipe, Cylinder Head and Cylinder Body
05-55
1 Valve
Seat 2
Exhaust Valve
Contaminated
Area
3
Valve Face
(Contact
Surface to
Valve Seat)
1 Valve Stem Diameter
055501
055502
055502
Valve Inspection
Valve Stem Seal
Always install new seals whenever valves
are removed.
Valve
Inspect valve surface, check for abnormal
stem wear and bending. If out of
specification, replace with a new one.
Valve stem roundness (Diameter runout)
(Intake and exhaust)
New
0.01 mm (0.0004 in)
Service
limit
0.05 mm (0.0020 in)
Valve Stem and Valve Guide Clearance
Measure valve stem and valve guide in
three places with a micrometer and a small
bore gauge
Note: Clean valve guide to remove
carbon deposit before measuring.
Change valve if valve stem is out of
specification or has other damages such
as wear or friction surface.
Valve stem diameter
Exhaust
New
4.955 mm~4.970 mm
(0.1951 in~0.1957 in)
Service
limit
4.930 mm (0.1941 in)
Intake
New
4.965 mm~4.980 mm
(0.1955 in~0.1960 in)
Service
limit
4.930 mm (0.1941 in)
Replace valve guide if valve guide is out of
specification or has other damages, such
as wear or friction surface.
Valve guide diameter (Intake and exhaust)
New
5.000 mm~5.012 mm
(0.1969 in~0.1973 in)
Service
limit
5.045 mm (0.1986 in)
2
1
1
3
Summary of Contents for CF1000ATR 2018
Page 1: ...CFMOTO SERVICE MANUAL CF1000AU CF1000ATR CFORCE 1000 ...
Page 81: ...CFMOTO 05 6 5 1 4 EIN Location EIN Location Engine left side Engine right side 050601 050602 ...
Page 351: ...06 Vehicle chassis 06 41 6 7 3 Front and rear CV shaft disassemble view 064101 064102 ...
Page 363: ...Appendix A ...
Page 364: ...Appendix B ...
Page 365: ...Appendix C ...