Vertex Forged Big Bore Piston Kit 23610A — Honda TRX400EX / X 1999-2014

Vertex Forged Big Bore Piston Kit 23610A — Honda TRX400EX / X 1999-2014

Product Description

Unlock more power and torque from your Honda TRX400EX or TRX400X with the Vertex Forged Big Bore Piston Kit (23610A). Designed to push your displacement to 460cc, this high-performance kit is the perfect upgrade for riders looking to dominate the trails or the track.

Manufactured from forged 2618 aluminum and heat-treated with a T-5 hardening cycle, this piston is built to withstand the rigors of high-performance riding. The addition of a Molybdenum Disulphite skirt coating not only ensures a faster, smoother break-in period but also provides superior wear resistance and durability over the long haul.

Top Features: Vertex Big Bore Piston Kit

• Displacement Boost: Increases your stock engine displacement to 460cc for significant gains in torque and peak horsepower.
• Forged Strength: Constructed from forged 2618 aluminum with T-5 heat treatment for maximum structural integrity.
• Advanced Coating: Molybdenum Disulphite skirt coating reduces friction, accelerates break-in, and extends piston life.
• Complete Kit: Includes the forged piston, high-quality ring set, wrist pin, and circlips.
• Standard Compression: Engineered at 9.3:1 compression, balancing performance with reliability.

Note: This kit features an 88.94 mm diameter designed for an 89.00 mm cylinder bore. Please ensure your cylinder is bored and plated/sleeved to the correct specifications before installation.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
1999	Honda	TRX400EX FourTrax
2000-2008	Honda	TRX400EX Sportrax
2009, 2012-2014	Honda	TRX400X

Frequently Asked Questions

Q: Do I need to modify my cylinder to use this kit?
A: Yes. Because this is a "Big Bore" kit (460cc), you must have your cylinder bored out to the required 89.00 mm diameter by a professional machine shop.

Q: Is this piston compatible with high-octane racing fuel?
A: This piston runs at a 9.3:1 compression ratio, making it well-suited for pump gas, though high-quality fuel is always recommended for peak performance in modified engines.

Expert Pro-Tip: When installing a forged piston, proper ring end-gap measurement is crucial. Always check the ring gap inside your newly bored cylinder according to the service manual or the documentation provided in the kit. Using high-quality assembly lube on the wrist pin and ring lands will help ensure a safe, successful first start-up.

Recommended Pairings:

• Essential Off-Road Motorcycle Tools
• Premium Motorcycle Maintenance Chemicals

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