Athena P400485100024 Big Bore Cylinder Kit (392cc) - 4.00mm Oversize to 68.00mm, 11.9:1 Compression helmets-helmet-accessories-replacement-parts-accessories Developed for the extreme loading

Developed for the extreme loading of off-road use while providing smoother

2009-2011 BMW K1300R

1985-1986 Honda TRX125

Removable Jaw for OF-77 Helmets

Athena P400485100024 Big Bore Cylinder Kit (392cc) - 4.00mm Oversize to 68.00mm, 11.9:1 Compression helmets-helmet-accessories-replacement-parts-accessories Developed for the extreme loadingKits 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: 1987 2006 Yamaha YFZ350 Banshee