Yamaha YZ450F Athena Stock Bore Cylinder Kit (2018–2019)
Yamaha YZ450F Athena 97mm Stock Bore Cylinder Kit – 4-Stroke (2018–2019)
🛠️ Description
Restore your Yamaha YZ450F’s factory performance with this Athena Stock Bore Cylinder Kit. Designed with a 97mm bore and forged piston, this kit is engineered for OEM fitment and durability while delivering Factory Works-level performance. With nickel-carbide coating and precision porting, it provides reliability and power for riders who demand the best from their 450.
✅ What’s Included
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Athena 97mm Nikasil-Coated Cylinder (Stock Bore – 450cc)
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Athena Forged OEM-Style Domed Piston Kit (piston, rings, wrist pin, circlips)
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Athena Top End Gasket Set (all required seals and hardware)
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High-Performance Hard Anodized Power Valves (not compatible with OEM valves)
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All parts brand new in original packaging
📦 Fitment
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Yamaha YZ450F (2018–2019)
🛡️ Warranty Info
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Manufacturer warranty included
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Professional installation recommended
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Warranty void if improper installation, tuning, or break-in procedures are followed
🔑 Key Features
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Stock bore 97mm (450cc) – 12.8:1 compression ratio
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Aluminum cylinder with nickel-carbide coating for durability
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Ported to Factory Works specifications for optimized performance
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Forged piston kit for strength under extreme racing conditions
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Complete top end gasket set included
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Direct OEM replacement – does not include cylinder head
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.