APPLICATION: HONDA CRF 450 R 13-16
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 BDC
CLOSING: 58.5°
after BDC 16° after TDC