Athena P400485100032 Big Bore Cylinder Kit (290cc) - 6.00mm Oversize to 83.00mm, 12.7:1 Compression helmets-offroad-helmets 2000-2017 Harley Davidson FLSTF Fat

2000-2017 Harley Davidson FLSTF Fat Boy

2008-2020 KTM 150 SX

2020 Can-Am Defender HD10 X mr

Our incredibly strong design is CNC machined from a solid block of 6061-T6 aircraft aluminum

Athena P400485100032 Big Bore Cylinder Kit (290cc) - 6.00mm Oversize to 83.00mm, 12.7:1 Compression helmets-offroad-helmets 2000-2017 Harley Davidson FLSTF FatKits include aluminum cylinder with nickel carbide coating designed with larger water jackets. Includes Forged piston, rings, clips and pin. Athena top end gasket set includes required seals and hardware. Easy to follow step by step installation instructions. Most are bolt on; no machining required except where noted. Vehicle Fitment: 2008 2017 Yamaha WR250R 2008 2011 Yamaha WR250X