02-18
CFMOTO
Valve / Camshaft / Rocker Arm / Cylinder Head
Item Standard - mm Limit Remark
Valve diameter
IN 33 --
EX 29 --
Valve thickness IN & EX 1 0.5
Valve clearance (Cold engine)
IN 0.06~0.14 --
EX 0.11~0.19 --
Valve guide diameter IN & EX 5.000~5.012 5.045
Valve stem outer diameter
IN 4.965~4.980 4.93
EX 4.955~4.970 4.93
Valve guide and stem clearance
IN 0.020~0.047 --
EX 0.030~0.057 --
Valve stem roundness (run out) IN & EX 0.01 0.05
Valve stem end run out IN & EX 0.02 0.05
Valve length
IN 90.1 --
EX 88.7 --
Valve bevel side run out IN & EX 0.03 0.05
Valve sealing line width
IN 1.2±0.1 1.7
EX 1.3±0.1 1.8
Valve spring free length IN & EX 40 38.2
Valve spring force IN & EX
Compress to 33mm:
200.5 N~235.5 N
Compress to 23mm:
531 N~587 N
--
Cam lobe height - Cylinder 1
IN 32.931~33.051 32.831
EX 32.945~33.065 32.845
Cam lobe height - Cylinder 2
IN 33.019~33.139 32.919
EX 32.853~32.973 32.753
Camshaft journal diameter
φ35 34.959~34.975 34.95
φ22 21.959~21.980 21.95
Camshaft bearing diameter
φ35 35.007~35.025 35.04
φ22 22.012~22.025 22.04
Camshaft bearing t clearance
φ35 0.032~0.066 0.09
φ22 0.032~0.066 0.09
Camshaft axial clearance 0.12~0.28 --
Camshaft run out 0.10
Rocker arm inner hole diameter IN & EX 12.000~12.018 12.03
Rocker arm shaft diameter IN & EX 11.973~11.984 11.96
Rocker arm shaft t clearance IN & EX 0.016~0.045 0.07
Rocker arm shaft axial clearance
IN & EX 0.06~0.34 --
Cylinder head atness 0.03 0.05
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Reproduction or duplication in any form, whole or in part, is strictly prohbited.
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