CAM GRIND #985/986
Fits: -01-05 YAMAHA RAPTOR 660 -02-08 YAMAHA GRIZZLY 660 -04-07 YAMAHA RHINO 660
Increase mid and upper end. Requires High Compression Piston, Exhaust System, and Performance Valve Spring Kit.
VALVE LIFT: .340"/.355"
DURATION: 267/273
DURATION AT .050": 238/242