CAM GRIND #685
Fits: -01-05 YAMAHA RAPTOR 660 -02-08 YAMAHA GRIZZLY 660
Race profile designed to increase mid and upper end performance. Includes compression release. Requires High Compression Piston, Exhaust System, Performance Valve Spring Kit, and Shortened Valve Guides. Check ALL clearances!
VALVE LIFT: .452"/.424"
DURATION: 292/289
DURATION AT .050": 260/257
