Yamaha 660 Grizzly (2002-2008) Hot Cams Camshaft Mudbuster: Single cam engine. Improved acceleration; more bottom-end; and no top-end loss. Must use Raptor 660 center intake valve spring; NOT included. All other valve springs stock. Uses stock auto-decompression mechanism.
Yamaha 660 Grizzly (2002-2008) Hot Cams Camshaft Single cam moto Single cam moto: True drop-in cam. No valve spring change needed. Improved acceleration; more bottom end; and no top-end loss. Uses stock valve springs and rockers. Uses stock auto decompression mechanism.