Fuller Hotrods 4144 Stroker Crankshaft Assembly +4mm Stroke Yamaha Raptor 660

The Fuller Hotrods 4144 is a heavy-duty stroker crankshaft assembly engineered to increase displacement and performance in 2001-2005 Yamaha Raptor 660 ATVs. This complete drop-in stroker crank features a +4mm stroke that increases engine displacement from 660cc to 719cc, delivering significant power gains without the need for costly case machining, custom cam chains, or spacer plates.

Key Features:

• +4mm stroke increases displacement to 719cc for enhanced power and torque
• Complete assembly includes proven Hot Rods connecting rods, top end bearings, and crankshaft webs
• Factory assembled, balanced, and trued for reliability and smooth operation
• True bolt-in design requires no case modifications or additional spacers
• Heavy-duty construction built to withstand increased performance demands
• Ready for installation out of the box

Important: Must be used with Vertex Stroker piston 23624A (sold separately). This stroker crankshaft is designed specifically for 2001-2005 Yamaha Raptor 660 models and provides a cost-effective way to significantly increase engine performance without extensive modifications.