Cylinder Head/Valves Service Information - Honda CRF450X 2005 Service Manual

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SERVICE INFORMATION
GENERAL
CYLINDER HEADIVALVES
• This section covers service of the camshaft, cyl inder head and valves. These services can be done with the engine
installed in the frame.
• During disassembly, mark and store the disassembled parts to ensure that they are reinstalled in their original loca-
tions.
• Clean all disassembled parts with cleaning solvent and dry them by blowing them off with compressed ai r before
inspection.
• Camshaft lubrication oil is fed through oil passages in the cylinder head. Clean the oil passages before assembling the
cylinder head .
• Be careful not to damage the mating surfaces when removing the cylinder head cover and cylinder head.
SPECIFICATIONS
valve guide
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I .
TORQUE VALUES
Cylinder head cover bolt
Camshaft holder mounting bolt
Decompressor cam mounting bolt
('05 - '07)
Cam sprocket bolt
Decompressor lifter arm mounting
nut (,OS - '07)
Cylinder head nut
Cam chain tensioner bolt
Crankshaft hole cap
Engine mounting nut
Engine hanger plate bolt
Spark plug
(upper)
EX
17.9 - 18.1 (0.70-0.71)
10 N·m (1.0 kgf·m, 7 Ibf.ft)
14 N·m (1.4 kgf.m , 10 Ibf·ft)
24 N·m (2.4 kgf·m, 18 Ibf·ft)
20 N'm (2.0 kgf·m, 15 Ibf·ft)
22 N·m (2.2 kgf·m, 16Ibf.ft)
66 N·m (6.7 kgf·m, 49 Ibf.ft)
12 N ·m (1.2 kgf.m , 9Ibf·ft )
15 N·m (1.5 kgf·m , 11 Ibf·ft)
54 N·m (5.5 kgf·m, 40 Ibf·ft)
26 N·m (2.7 kgf·m, 19 Ibf·ft)
22 N·m (2.2 kgf·m, 16Ibf·ft)
Apply oil to the threads
Apply oil to the threads
Apply locking agent to the th reads
Apply oil to the threads and seati ng surface
Apply oil to the threads and seating surface
Apply loC\C::ing agent to the threads
Apply grease to the threads
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