Banshee Athena-Style 421cc 68 Big Bore +4 STROKER Cylinders WISECO Pistons Domes

Yamaha Banshee ARES 68mm Cylinders by BPRATV – Athena Nikasil Performance at a Fraction of the Cost!

✅ Unleash Athena-Level Power at a Fraction of the Cost

The BPRATV Banshee ARES 68mm Cylinder Kit is engineered for riders who want serious horsepower, reliability, and value. Featuring factory pre-ported dune/play port design, larger water jackets, and triple exhaust ports, this kit is ready for +4mm stroker builds—no spacer required.

🔥 Built to Perform – Complete Top End Kit

• Banshee ARES 68mm Nikasil Cylinders – pre-ported for dune/play powerband
• Larger water jackets for superior cooling
• Triple exhaust ports for a wide, responsive powerband
• TRULY PORTED – No Gimmicks, No Games. When we say ported, we mean it. Every cylinder is factory ported with a dune/play design that delivers hard-hitting mid-range pull and screaming top-end power for all-around performance. 
  • Don’t be fooled by “Triple Ported” Cylinder claims — all that means is the cylinder has three exhaust ports (ours do too). What sets us apart is that our cylinders are actually performance-ported for real gains, not just marketing jargon. 😂
• Wiseco Pro Lite Forged Pistons with rings, pins, and circlips
• Heavy-duty wrist pin bearings
• Special cut 68mm big bore 4mil stroker domes (22cc)
• Cometic one-piece fiber base gasket, intake gaskets, and cool head O-ring kit*

🚨 Port Timing Matters – Even on Pre-Ported Cylinders

This 421cc kit is drop-in and bolt-on ready, and the cylinders are already factory dune/play ported. However, porting and port timing are not the same thing—and this is where many builds leave power on the table.

Porting refers to the shape and flow characteristics of the ports (which is already done). Port timing refers to when those ports open and close in relation to the crankshaft. When stepping up to a 421cc +4mm stroke, the piston travels farther, which changes the effective timing—even on a pre-ported cylinder.

• Cylinders are dune/play ported, but timing is optimized for 392cc–400cc setups
• Correcting port timing restores ideal piston-to-port relationship for a +4mm stroke
• Thick base gaskets only raise the cylinder and hurt compression and power
• Proper timing unlocks stronger mid-range, cleaner revs, and higher peak power
• Use BPRATV’s in-house port timing service to get everything this kit can deliver

✅ What Makes Nikasil Special?

When it comes to building a high-performance Yamaha Banshee, Nikasil (nickel-silicon carbide plating) is a game-changer.

• Transfers heat more efficiently, keeping your motor cooler
• Provides a harder, smoother piston surface, reducing friction
• Lasts longer between rebuilds thanks to durability
• Lightweight aluminum design for stronger performance

Athena vs CPI Cub vs BPRATV ARES

Athena and CPI Cub cylinders have long been the benchmark for Banshee builds. Athena delivers strength at a higher price, while CPI Cubs are known for raw performance and Nikasil durability. The BPRATV ARES cylinder bridges the gap—offering Athena-level performance at a fraction of the cost!

✅ Key Features of the BPRATV ARES Cylinder

• 68mm bore size – runs 392cc to 421cc depending on setup
• Larger water jackets for enhanced cooling
• Triple exhaust ports for responsive, wide powerband
• ACTUALLY PORTED with dune/play port design (strong mid-range pull and screaming top-end power for all-around performance)
• Nikasil plating for superior strength and low friction

Tested Across Banshee Builds

Proven across real-world setups:

• 392cc & 400cc non-stroker builds for balanced performance
• 421cc +4mm stroker builds with Hot Rods crankshafts & Pro Design heads
• Delivers Athena-level power (or more with dune/play ported design) at a lower cost

🌟 Why Buy from BPRATV? Trusted Banshee Experts 🌟

At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We deliver only the highest quality Yamaha Banshee performance parts, proven to run stronger and last longer. Trust BPRATV to keep your Banshee running at its absolute best, every single time.

🔥 Upgrade your Yamaha Banshee with the ARES 68mm Cylinder Kit – power, precision, and reliability in one package! 🔥

BPRATV - The Best Parts. The Best Performance. The Best Price.

BRAPPPPPPPPPP!

© BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.* Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations. This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA -certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/that purchase this product represent and warrant that the product is purchased only in connection with EPA -certified, emission-regulations-exempt and noise-regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law.