{"product_id":"yamaha-banshee-ares-68mm-nikasil-cylinder-kit-421cc-stroker-top-end-rebuild-kit","title":"Yamaha Banshee ARES 68mm Nikasil Cylinder Kit 421cc Stroker Top End Rebuild Kit","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 0.000000px; color: transparent;\"\u003eS410485301023, S410485301024, P400485850351\/1, 13077M06800, 9768M06800, BR8ES, PD300A, 2GU-11321-00-00, 2GU-11311-00-00, 2GU-11181-00-00, 2GU-11111-00-0, 3GG-11351-02-00, 2GU-11631-00-94, 2GU-11610-01-00, 93450-17129-00, 93310-316D6-00, 4L0-11633-00-00, BR8-ES000-00-00, B8E-S0000-00-00, 91830-21014-00 99530-10014-00 99510-10114-00, PD909\u003c\/span\u003e\u003c\/p\u003e \u003cdiv style=\" max-width:800px; margin:0 auto; font-family:Arial,Helvetica,sans-serif; font-size:16px; line-height:1.5; color:#222; \"\u003e \u003ch2 style=\"text-align:center;font-size:26px;margin:0 0 12px 0;\"\u003e \u003cstrong\u003eYamaha Banshee ARES 68mm Cylinders by BPRATV – Athena Nikasil Performance at a Fraction of the Cost!\u003c\/strong\u003e \u003c\/h2\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:20px 0 8px 0;\"\u003e ✅ Unleash Athena-Level Power at a Fraction of the Cost \u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 0 16px 0;\"\u003e The \u003cstrong\u003eBPRATV Banshee ARES 68mm Cylinder Kit\u003c\/strong\u003e is engineered for riders who want serious horsepower, reliability, and value. \u003cstrong\u003eFeaturing factory pre-ported dune\/play port design\u003c\/strong\u003e, larger water jackets, and triple exhaust ports, this kit is ready for +4mm stroker builds—no spacer required. \u003c\/p\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:22px 0 8px 0;\"\u003e 🔥 Built to Perform – Complete Top End Kit \u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBanshee ARES 68mm Nikasil Cylinders\u003c\/strong\u003e – pre-ported for dune\/play powerband\u003c\/li\u003e \u003cli\u003eLarger water jackets for superior cooling\u003c\/li\u003e \u003cli\u003eTriple exhaust ports for a wide, responsive powerband\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eTRULY PORTED – No Gimmicks, No Games.\u003c\/strong\u003e When we say ported, we mean it. \u003cstrong\u003eEvery cylinder is factory ported\u003c\/strong\u003e with a dune\/play design that delivers hard-hitting mid-range pull and screaming top-end power for all-around performance. \u003cul\u003e \u003cli\u003e Don’t be fooled by \u003cstrong\u003e“Triple Ported”\u003c\/strong\u003e 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. 😂 \u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWiseco Pro Lite Forged STROKER Pistons\u003c\/strong\u003e with rings, pins, and circlips\u003c\/li\u003e \u003cli\u003eHeavy-duty wrist pin bearings\u003c\/li\u003e \u003cli\u003eSpecial cut 68mm big bore 4mil stroker domes (22cc)\u003c\/li\u003e \u003cli\u003eCometic one-piece fiber base gasket, intake gaskets, and cool head O-ring kit*\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:22px 0 8px 0;\"\u003e 🚨 Port Timing Matters – Even on Pre-Ported Cylinders \u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 0 14px 0;\"\u003e This \u003cstrong\u003e421cc\u003c\/strong\u003e kit is \u003cstrong\u003edrop-in and bolt-on ready\u003c\/strong\u003e, and the cylinders are already factory dune\/play ported. However, \u003cstrong\u003eporting\u003c\/strong\u003e and \u003cstrong\u003eport timing\u003c\/strong\u003e are not the same thing—and this is where many builds leave power on the table. \u003c\/p\u003e \u003cp style=\"text-align:center;margin:0 0 14px 0;\"\u003e \u003cstrong\u003ePorting\u003c\/strong\u003e refers to the shape and flow characteristics of the ports (which is already done). \u003cstrong\u003ePort timing\u003c\/strong\u003e refers to when those ports open and close in relation to the crankshaft. When stepping up to a \u003cstrong\u003e421cc +4mm stroke\u003c\/strong\u003e, the piston travels farther, which changes the effective timing—even on a pre-ported cylinder. \u003c\/p\u003e \u003cul\u003e \u003cli\u003eCylinders are dune\/play ported, but timing is optimized for 392cc–400cc setups\u003c\/li\u003e \u003cli\u003eCorrecting port timing restores ideal piston-to-port relationship for a +4mm stroke\u003c\/li\u003e \u003cli\u003eThick base gaskets only raise the cylinder and hurt compression and power\u003c\/li\u003e \u003cli\u003eProper timing unlocks stronger mid-range, cleaner revs, and higher peak power\u003c\/li\u003e \u003cli\u003eUse \u003cstrong\u003eBPRATV’s in-house port timing service\u003c\/strong\u003e to get everything this kit can deliver\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:22px 0 8px 0;\"\u003e ✅ Compatibility \u0026amp; Nikasil Advantages \u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 0 14px 0;\"\u003e Designed for Yamaha Banshee YFZ350 models from 1987–2006. The \u003cstrong\u003eNikasil-plated aluminum cylinders\u003c\/strong\u003e provide superior durability, cooling, and piston life compared to traditional sleeves. \u003c\/p\u003e \u003cul\u003e \u003cli\u003eTransfers heat more efficiently to keep engine temperatures lower\u003c\/li\u003e \u003cli\u003eHarder, smoother piston surface reduces friction and wear\u003c\/li\u003e \u003cli\u003eLonger service life between rebuilds\u003c\/li\u003e \u003cli\u003eLightweight aluminum design improves throttle response\u003c\/li\u003e \u003cli\u003eProven across 392cc, 400cc, and 421cc Banshee builds\u003c\/li\u003e \u003c\/ul\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:22px 0 8px 0;\"\u003e Athena vs CPI Cub vs BPRATV ARES \u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 0 14px 0;\"\u003e Athena and CPI Cub cylinders have long been respected benchmarks in high-performance Yamaha Banshee builds. \u003cstrong\u003eAthena\u003c\/strong\u003e is known for proven durability and consistency at a premium price point, while \u003cstrong\u003eCPI Cub\u003c\/strong\u003e cylinders are recognized for race-focused power and Nikasil longevity. The \u003cstrong\u003eBPRATV ARES cylinder\u003c\/strong\u003e bridges the gap—delivering \u003cstrong\u003eAthena-level performance\u003c\/strong\u003e, strong power potential, and proven reliability with exceptional overall value for serious riders. \u003c\/p\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:22px 0 12px 0;\"\u003e ❓ Frequently Asked Questions (FAQ) \u003c\/h3\u003e \u003cdiv style=\"max-width:720px;margin:0 auto;\"\u003e \u003cdiv style=\"margin-bottom:22px;\"\u003e \u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Are these cylinders actually ported or just triple exhaust?\u003c\/strong\u003e\u003c\/p\u003e \u003cp style=\"margin:0 0 0 20px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e TRULY PORTED – No Gimmicks, No Games. Every cylinder is factory ported with a dune\/play design for real performance gains.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv style=\"margin-bottom:22px;\"\u003e \u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Is this kit drop-in ready?\u003c\/strong\u003e\u003c\/p\u003e \u003cp style=\"margin:0 0 0 20px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, but proper port timing correction is required for stroker builds to achieve full performance.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv\u003e \u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: What fuel is recommended?\u003c\/strong\u003e\u003c\/p\u003e \u003cp style=\"margin:0 0 0 20px;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e With proper tuning, premium pump gas can be used.\u003c\/p\u003e \u003c\/div\u003e \u003c\/div\u003e \u003ch3 style=\"color:#c00;text-align:center;margin:22px 0 8px 0;\"\u003e 🌟 Why Buy from BPRATV? Trusted Banshee Experts 🌟 \u003c\/h3\u003e \u003cp style=\"text-align:center;margin:0 20px 14px 20px;\"\u003e At BPRATV, our promise is unwavering: \u003cstrong\u003eThe Best Parts. The Best Performance. The Best Price.\u003c\/strong\u003e We deliver only the highest quality Yamaha Banshee performance parts, proven to run stronger and last longer. Trust BPRATV to keep your \u003cstrong\u003eBanshee\u003c\/strong\u003e running at its absolute best, \u003cstrong\u003eevery single time\u003c\/strong\u003e. \u003c\/p\u003e \u003cp style=\"text-align:center;color:#38761d;margin:0 0 18px 0;\"\u003e \u003cstrong\u003e\u003cem\u003e🔥 Upgrade your Yamaha Banshee with the ARES 68mm Cylinder Kit – power, precision, and reliability in one package! 🔥\u003c\/em\u003e\u003c\/strong\u003e \u003c\/p\u003e \u003cdiv align=\"center\"\u003e \u003cstrong\u003e\u003cspan style=\"color:#0000ff;\"\u003eBPRATV - The Best Parts. The Best Performance. The Best Price.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003e\u003cspan style=\"color:#0000ff;\"\u003eBRAPPPPPPPPPP!\u003c\/span\u003e\u003c\/strong\u003e \u003c\/div\u003e \u003cp style=\"text-align:center;font-size:10px;color:#555;margin:20px 0 0 0;\"\u003e © BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.*\u003cbr\u003e\u003cbr\u003e Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express or implied warranty. This product is exempt from emission standards under 40 C.F.R. § 1051.620 and is sold for closed-course competition use only. \u003c\/p\u003e \u003c\/div\u003e","brand":"BPRATV","offers":[{"title":"Default Title","offer_id":45149323329733,"sku":"267423155600\/BAN68LRC\/573M06800\/35-520\/AD685\/JT","price":713.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0593\/1083\/3861\/files\/BPRATVYamahaBansheeARES421ccAthenaCylindersWisecoCP-CarrilloCometic_29.png?v=1759383451","url":"https:\/\/bpratv.com\/products\/yamaha-banshee-ares-68mm-nikasil-cylinder-kit-421cc-stroker-top-end-rebuild-kit","provider":"BPRATV","version":"1.0","type":"link"}