Banshee Athena 68mm Big Bore 421 Stroker

Yamaha Banshee Athena 68mm Big Bore 421 Stroker – Built for Extreme Power

Transform your Yamaha Banshee into a high-performance beast with the Athena 68mm Big Bore 421 Stroker Kit. Designed for serious riders and racers, this setup delivers massive horsepower gains, insane torque, and a broader powerband that dominates on any terrain.

The heart of this build is the 68mm Athena Big Bore Cylinders, precision-crafted from high-grade aluminum and nickel-carbide coated for optimal durability and heat resistance. The larger bore increases your engine displacement, allowing for more fuel and air to combust—resulting in explosive power and faster acceleration.

Paired with a 4mm stroker crank, the 421cc configuration offers an incredible boost in bottom-end torque while still maintaining the Banshee’s iconic high-revving character. This makes it perfect for drag racing, dune riding, and open terrain where raw power and quick response are essential.

The Athena 421 Stroker Kit is often matched with high-compression pistons, custom porting, and upgraded intake/exhaust systems for optimal performance. It’s a race-inspired setup that turns your Banshee into a true powerhouse, capable of outpacing stock and lightly modified builds with ease.

Despite its aggressive output, the Athena 421 stroker is built for reliability when paired with proper tuning, jetting, and cooling support. Whether you’re building a track weapon or an all-around performance machine, this kit gives you the foundation to take your build to the next level.

If you’re looking for the ultimate Yamaha Banshee upgrade, the Athena 68mm Big Bore 421 Stroker is the perfect combination of power, performance, and precision. Dominate every ride with confidence and unleash the full potential of your Banshee.