APPLICATION: HONDA CRF 450 R 11-12
PROFILE CHARACTERISTICS:
RACING PROFILE for top
end MOTOCROSS or SUPERMOTARD applications.
This profile provides
great increase in top end: suitable for flat tracks where top power and high
RPM are required.
Intake lobes have very
high lift to grant maximum intake flow.
Requires Exhaust
System, High Compression Piston, and Performance Valve Spring Kit. Check ALL
clearances!
Larger diameter lifters
are required.
Web Cams item code: 59-012
Profile: 242
/ 921
INTAKE EXHAUST
Valve Lash (Inch): .006" .009"-
.0011”
Valve Lift (Inch): 0.418 0.317
Valve Lift (mm): 10.62 8.05
Advertised Duration: 284° 285°
Duration @ 0.050": 261° 249°
Lobe Center: 108° 108.5° Overall
108.25°
OPENING: 22.5°
before TDC 53° before TDC
CLOSING: 58.5° after
TDC 16° after TDC