Wiseco Piston Kit 95mm STD 12:1 Armorglide – Yamaha YFZ450 / YFZ450R (2004–2018)
Wiseco Forged Piston Kit – 95.00mm STD Bore / 12:1 Compression — Yamaha YFZ450 & YFZ450R (2004–2018) — 4865M09500
Built for serious racers and aggressive riders, the Wiseco 95.00mm forged piston kit is precision-engineered for maximum strength, durability, and performance. Featuring Armorglide skirt coating for reduced friction, this piston delivers smoother operation, longer life, and race-winning reliability. With a 12:1 compression ratio, you’ll gain a noticeable increase in power and throttle response while maintaining compatibility with pump or race fuel.
Each kit includes piston, rings, wrist pin, and circlips, making it a direct-fit top-end rebuild solution for Yamaha YFZ450 and YFZ450R models.
Features
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Forged from high-silicon, low-expansion aluminum for superior strength and reduced weight
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Armorglide skirt coating reduces friction and cylinder wear for longer service life
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Diamond-turned CNC finish guarantees perfect sizing and fitment with no size variation
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Compatible with any cylinder bore composition, including OEM and aftermarket plated cylinders
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12:1 compression ratio boosts horsepower and torque without sacrificing reliability
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State-of-the-art manufacturing ensures precision and consistency
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Includes piston, rings, wrist pin, and circlips
Fitment
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Yamaha YFZ450R: 2009–2018 (including SE models)
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Yamaha YFZ450: 2004–2013 (including Bill Balance Edition and SE models)
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Yamaha YFZ450X: 2010–2011 (including SE)
Part Details
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Part Number / Brand Number: 4865M09500 (4865PS)
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Weight: 0.98 lbs
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Package Dimensions: 5.00 × 5.00 × 4.50 in
📦 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.