Athena P400510100001 Standard Bore Ø 400cc 90 mm cylinder kit

Restore your 400cc engine´s lost power and reliability with the Athena P400510100001 Standard Bore Cylinder Kit. This premium, direct-replacement top-end kit precisely matches original specifications for optimal compression and performance. Crafted from high-grade aluminum alloy with a friction-reducing Nicasil coating and CNC machining, it ensures exceptional durability and a flawless fit. Easy bolt-on installation with no crankcase modifications required. Ideal for ATV and motorcycle rebuilds