Yamaha Banshee 1987–2006 67.96mm Big Bore Piston Kit B for Athena Cylinder – S4C06800001B

Yamaha Banshee 1987–2006 67.96mm Big Bore Piston Kit (Type B) for Athena Cylinder – S4C06800001B Description 392cc Banshee domination — the Athena S4C06800001B is a cast 67.96mm big bore piston kit (Type B) designed exclusively for Athena Banshee big bore cylinders (1987–2006 YFZ350 Banshee). 4032 aluminum alloy, domed head, molybdenum-coated, CNC-machined to 0.01mm tolerance, and dyno/track-tested for extreme conditions — direct replacement for Athena big bore rebuilds (Type B sizing).

What’s Included

• 67.96 mm Cast Piston – domed, molybdenum coated (Type B)
• Piston Rings – low-tangential load, perfect seal
• Wrist Pin
• Circlips

Key Features

• 67.96 mm bore — matches Athena Banshee big bore cylinders (Type B)
• 392 cc displacement (with Athena cylinder)
• 4032 aluminum alloy — high resistance to mechanical/thermal stress
• CNC precision — tolerances < 0.01 mm
• Molybdenum coating — reduced friction, longer life
• Domed head — stock compression ratio
• Made in Italy — dyno & track proven

Fitment

• 1987–2006 Yamaha YFZ350 Banshee (with Athena big bore cylinder only – Type B)

Warranty Info Backed by Athena limited warranty. Professional installation recommended. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov