Honda TRX400EX / TRX400X Big Bore Forged Piston Kit (88.94mm) – Vertex 23610A

🛠️ Description
Unlock more power from your Honda 400EX/400X with the Vertex 88.94mm forged big bore piston kit. Designed specifically for use with the Hot Rods stroker crankshaft, this kit increases displacement to 460cc while improving torque and peak horsepower. Built from forged 2618 aluminum with a molybdenum disulphite skirt coating, it offers exceptional strength, heat resistance, and longevity.

✅ What’s Included

• Forged piston (88.94mm / +4mm oversize)

• Ring set

• Wrist pin

• Circlips

📦 Fitment

• 1999 Honda TRX400EX FourTrax

• 2000–2008 Honda TRX400EX Sportrax

• 2009, 2012–2014 Honda TRX400X

🛡️ Warranty Info
Manufacturer’s warranty applies. Returns must follow store policy for unused, uninstalled items in original packaging. Please confirm year, make, and model before ordering.

🔑 Key Features

• +4mm stroker piston designed for use with Hot Rods stroker crankshaft

• Heat-treated with T-5 hardening/tempering for strength

• Forged 2618 aluminum for durability under high loads

• Molybdenum disulphite skirt coating reduces friction and speeds up break-in

• 9.3:1 compression ratio for increased performance with reliability

• Boosts displacement to 460cc when paired with stroker crank

⚠️ Notes

• Requires Hot Rods Stroker Crankshaft (CBK0163) for proper installation and displacement increase.

• Designed for 4-stroke TRX400EX/TRX400X engines only.