Yamaha YZ85 (2019–2025) 47.50mm Stock Bore Race Cylinder Kit – Athena P400485100076
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Yamaha YZ85 2019–2025 47.50mm Stock Bore Factory Works Race Kit – Athena Description Mini MX power, factory-level — the Athena P400485100076 is a complete stock-bore race cylinder kit for 2019–2025 Yamaha YZ85. 47.50mm nickel-carbide plated aluminum cylinder with larger water jackets, Factory Works porting, removable bronze dome head for higher compression/anti-detonation, hard-anodized power valves, Cast-Lite flat-top piston, and full top-end gasket set — bolt-on, no machining for instant mini/supermini domination.
What’s Included
- 47.50 mm Aluminum Cylinder – nickel-carbide coated, larger water jackets, Factory Works porting
- Aluminum Cylinder Head – removable bronze dome (higher compression, anti-detonation)
- Hard-Anodized Power Valves – high-flow, non-OEM
- Cast-Lite Flat-Top Piston Kit – rings, pin, clips
- Athena Top-End Gasket Set – head/base gaskets, seals, hardware
Key Features
- 47.50 mm stock bore — direct OEM replacement, no boring
- Nickel-carbide plating — extreme durability, low friction
- Larger water jackets — better cooling under race load
- Factory Works porting — max airflow, pro-tuned performance
- Removable bronze dome head — higher compression, detonation resistance
- Hard-anodized power valves — faster response, longer life
- Made in Italy — race-proven precision
Fitment
- 2019 Yamaha YZ85
- 2020 Yamaha YZ85
- 2021 Yamaha YZ85
- 2022 Yamaha YZ85
- 2023 Yamaha YZ85
- 2024 Yamaha YZ85
- 2025 Yamaha YZ85
Warranty Info Backed by Athena limited warranty. Professional installation recommended. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Price & SKU Retail Price: $1,019.95 SKU: 0931-0975 / P400485100076 Weight: 4.86 lbs Availability: In Stock
📦 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.
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