Join Date: Sep 2007
Location: Grande Prairie, Alberta, Canada
Thanked 83 Times in 69 Posts
Rep Power: 119
It wont work. IIRC the grizz 660 is a 4 valve unit, the raptor is a 5 valve. So you would need to have an entire head, complete with cam etc, and hope the chain is correct. Also IIRC the grizz has straight exhaust, where the raptor has angled exhaust flanges. So to do it, you would need to mod your exhaust, or somehow make a raptor header work. This would also kill quiet a bit of your bottom end, since the raptor is aimed more at the top end, since you can use the clutch. So the cam might be a bit agressive. Though I dont know that for sure.
07 Red 700 Grizzly. EPI Clutch Kit, Powermad Hand Guards, Heated Grips and Thumb, 1.5" Wheel Spacers, One Off, Dual 2" Intake Snorkels, 2" CVT snorkels, 27" 589s (to be changed). Monkey Axkes Up Front, VDI sitting and waiting. 11:1 on its way, maybe cam