Honda TRX450R/ER 100mm Big Bore Complete Rebuild Kit

Honda TRX450R/ER 100mm Big Bore Complete Rebuild Kit

Regular price$3,518.00
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🏁 100mm Big Bore Complete Engine Rebuild Kit – Honda TRX450R / TRX450ER (2006–2014)

Take your Honda TRX450R or ER to the next level with this complete big bore engine rebuild kit. Designed for riders who want max performance and reliability, this kit includes everything needed for a full bottom-to-top rebuild using quality components built to last.


🔧 What's Included:

  • 🧱 New OEM crankcases bored for 100mm cylinder

  • 🔥 100mm Big Bore Cylinder – Ready to install

  • 🥇 JE or CP Forged Piston – High-compression performance

  • 🧩 Nitrite-Coated Piston Rings

  • 🔩 Chrome Wristpin & Circlips

  • 🌀 Hotrods Crankshaft Assembly – Trued & welded at the pin

  • 🛠 Complete Gasket Kit

  • 💨 Cometic MLS Head Gasket – Perfect seal under pressure

  • 🧪 Full Seal Kit – Engine, crank, water pump

  • 🔧 Crank Bearings, Crank Balancer Bearings, Transmission Bearings

  • 💪 Talon TITANIUM Cylinder Stud Kit – Lifetime warranty*

  • 🛡️ Heavy Duty Clutch Kit

  • 🧼 K&N Oil Filter

  • ⛓️ Cam Timing Chain


⚙️ Compatibility:

✔️ Fits All 2006–2014 Honda TRX450R & TRX450ER Models

  • Electric & Kick Start Variants


⛽ Fuel:

🏁 Runs on pump or race gas


📦 Handling Time:

⏱️ Ships in 5–7 business days (hand-picked, packed, and verified by our expert team)


🛡️ Warranty:

All parts are brand new and covered by a 1-year warranty against manufacturer defects. Installation by a qualified mechanic is required to maintain eligibility.



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.

Sold items are removed daily.

If you see it on this website, it is 100% in stock unless it just sold before you clicked buy.

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