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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