APPLICATION: HONDA CRF 450 R 10-15
PROFILE CHARACTERISTICS:
PERFORMANCE
PROFILE for MOTOCROSS applications.
This
profile is designed to increase mid and upper end: the
higher lift and the duration combination of this profile, increase power,
torque and provide smooth output delivery.
Requires
Exhaust System, High Compression Piston, and Performance Valve Spring Kit.
Check ALL clearances!
Web Cams item code: 57-972
Profile: 961 / 812
INTAKE EXHAUST
Valve Lash (Inch): .006" .009"-
.0011”
Valve Lift (Inch): 0.400 0.331
Valve Lift (mm): 10.16 8.41
Advertised Duration: 282° 279°
Duration @ 0.050": 258° 243°
Lobe Center: 108° 108.5° Overall 108.25°
OPENING: 20°
before TDC 50° before TDC
CLOSING: 56°
after TDC 13° after TDC