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APPLICATION: HONDA CRF 450 R 13-16

PROFILE CHARACTERISTICS:

RACING PROFILE for top end MOTOCROSS applications.

This profile provides great increase in mid and upper end: high lift and extended duration suitable for tracks where maximum power and torque are required.

Requires Exhaust System, High Compression Piston, and Performance Valve Spring Kit. Check ALL clearances!

Can work with OEM lifters, but larger diameter lifters are advised to provide maximum durability.

Web Cams item code: 57-992

Profile: 208 / 921

INTAKE EXHAUST

Valve Lash (Inch): .006" .009"- .0011”

Valve Lift (Inch): 0.408 0.317

Valve Lift (mm): 10.36 8.05

Advertised Duration: 282° 285°

Duration @ 0.050": 258° 249°

Lobe Center: 108° 108°

OPENS: 21° before TDC 52.5° before BDC

CLOSES: 57° after BDC 16.5° after TDC