Athena 68mm Big Bore Cylinder Kit – Yamaha Banshee 350 (1987–2012)
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Athena 68mm Big Bore Race Cylinder Kit – Yamaha Banshee 350 (1987–2012)
🛠️ Description
Upgrade your Yamaha Banshee with the Athena 68mm Big Bore Race Cylinder Kit, taking displacement to 392cc for serious performance gains. This kit includes nickel-carbide–plated aluminum cylinders, a removable bronze dome cylinder head, and Athena’s high-performance power valves designed specifically for this kit. Perfect for riders looking for reliable power in the dunes, track, or trail.
✅ What’s Included
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(2) Aluminum cylinders, 68.00mm bore, nickel-carbide coated
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Cylinder head with removable bronze dome
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High-performance, hard-anodized power valves (non-OEM)
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Piston kit (cast lite flat-top pistons, rings, clips, pin)
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Complete Athena top-end gasket set with seals and hardware
📦 Fitment
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Yamaha Banshee YFZ350 (1987–2006)
🛡️ Warranty Info
Backed by Athena against defects in materials and workmanship. Improper installation, tuning, or race-related damage is not covered. Professional installation is strongly recommended.
🔑 Key Features
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Big Bore setup: increases displacement to 392cc
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Nickel-carbide–plated aluminum cylinders for durability and heat dissipation
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Removable bronze dome cylinder head
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Race-designed hard-anodized power valves (OEM valves not compatible)
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Cast lite flat-top pistons included
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Complete with top-end gaskets, seals, and hardware
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Designed for high-performance 2-stroke Banshee builds
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
