Honda CRF 450 X (05-07) SOHC 4v

Part #: 55-462
Grind: 493/729

Intake Exhaust
Valve Lash (Inch): .006 .009
Valve Lift (Inch): 0.415 0.342
Valve Lift (mm): 10.54 8.69
Advertised Duration: 276° 288°
Duration @ 0.050": 252° 252°
Lobe Center: 110° 104° = 107° Overall

Intake
Opens
16° Before
TDC
Exhaust
Opens
50° Before
BDC

Intake
Closes
56° After
BDC
Exhaust
Closes
22° After
TDC

Valve Timing Is Checked With Zero Valve Lash
@ 0.050 Inches Of Valve Lift.
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