Honda TRX400EX/X Vertex 440cc Forged Big Bore Piston Kit – 86.97mm (2000-2014)
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Honda TRX400EX/X 440cc Forged Big Bore Piston Kit – Vertex (86.97mm, +2.00mm)
Description
🛠️ Boost your Honda TRX400EX or TRX400X with this high-performance Vertex forged big bore piston kit. Engineered from 2618 forged aluminum and coated with Molybdenum Disulphite for reduced friction, it increases engine displacement to 440cc for more torque and peak horsepower. Perfect for riders seeking a reliable and long-lasting power upgrade.
What’s Included
✅ Forged 2618 Aluminum Big Bore Piston (+2.00mm / 86.97mm)
✅ Piston Ring Set
✅ Wrist Pin
✅ Circlips
Fitment
📦 2009, 2012–2014 Honda TRX400X
📦 2000–2008 Honda TRX400EX Sportrax
📦 1999 Honda TRX400EX FourTrax
Warranty Info
🛡️ Manufacturer’s warranty against defects in materials or workmanship.
Key Features
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T-5 heat-treated and tempered for strength
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Forged 2618 aluminum for superior durability
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Molybdenum Disulphite skirt coating for reduced friction and faster break-in
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+2.00mm oversize increases displacement to 440cc
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10.0:1 compression ratio for balanced performance and reliability
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Increases torque and peak horsepower
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Direct OE stock compression big bore design
📦 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.
