Big Bore Kits
Fuel Moto136" Big Bore Kit - Gen 2 M8 (121")
✓ Verified fit for your 2026 CVO Street Glide 121 VVT
About this part
136in Big Bore Piston & Cylinder Kit for the redesigned (Gen 2) Harley-Davidson Milwaukee-8 121in 4.625in-stroke engine - the largest displacement available for the Gen 2 M8 engine without case boring
Options that fit your bike
- Base kit$1,499.95