Big Bore Kits
Fuel MotoM8 128" Piston & MotorWitch Billet Cylinder Kit (114/117" Engines)
✓ Verified fit for your 2020 Fat Boy 114
About this part
128in Big Bore Kit combining Fuel Moto's own CP Carrillo piston design with CNC-machined billet cylinders from Motorwitch Industries, for Harley-Davidson M8 114in or 117in engines, no case boring required
Options that fit your bike
- Base kit$2,999.95