TRX400EX/TRX400X Big Bore Engine Kit 88mm – Wiseco 2006–2014

TRX400EX/TRX400X Big Bore Engine Kit 88mm – Wiseco 2006–2014

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2006–2014 Honda TRX400EX / TRX400X Big Bore Engine Rebuild Kit – Wiseco 88mm +3mm

🛠️ Boost your TRX400X/EX’s power with this Wiseco big bore engine rebuild kit. Featuring an 88.00mm (+3mm) premium forged piston and a full top and bottom end setup, this kit is perfect for riders demanding more torque and reliability.


✅ What’s Included:

  • Forged Wiseco big bore piston (88.00mm / +3.00mm)

  • High-quality cam chain

  • Complete gasket kit with oil seals

  • Main bearings & crank seals

  • Hour meter with bracket

  • Heavy-duty crankshaft & rod assembly

  • All necessary clips, pins, and seals for a full rebuild


📦 Fitment:
Fits the following models:

  • 2006–2008 Honda TRX400EX

  • 2009, 2012–2014 Honda TRX400X


🛡️ Warranty Info:
No manufacturer warranty after installation. Professional installation and correct clearances required for durability.

We ship next day most of the time. Modquad parts are shipped Monday-Thursday. Engine Kits are 3-5 business days.

We don't do backorder! If your items has already sold you will be notified immediately and you money refunded on the spot.

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