Fuller Hotrods 4178 Stroker Crankshaft Yamaha +5mm Heavy Duty 727cc

The Fuller Hotrods 4178 is a heavy-duty drop-in stroker crankshaft designed for Yamaha powersports engines. This performance crankshaft increases displacement to 727cc with a +5mm stroke, delivering enhanced power and torque without requiring costly modifications like case machining, custom cam chains, or spacer plates.

Key Features:

• +5mm stroke increases displacement to 727cc for improved performance
• Drop-in design requires no case machining or custom components
• Compatible with stock OEM piston for easy installation
• Complete assembly includes Hot Rods connecting rods, top end bearings, and crankshaft webs
• Factory assembled, balanced, and trued for reliable operation
• Ready for bolt-in installation

This stroker crankshaft provides a straightforward path to increased engine displacement and performance using proven Hot Rods components. The complete assembly arrives ready to install, making it an efficient upgrade for riders seeking more power from their Yamaha engine.