Name: Honda TRX 400EX/400X 89mm 440cc Engine Rebuild Kit
Brand: AZ
SKU: 3P-440-RK-1
Price: 1108.0 CAD
Availability: InStock

Honda TRX 400EX/400X 89mm 440cc Engine Rebuild Kit

$1,108.00

Shipping calculated at checkout.

Select Year of ATV

1999-2004

2005-2015

Select Piston Kit

Wiseco 11:1 Compression (Pump Gas) Part #4667M08900

JE 10.8:1 Comp (Pump Gas) Part #247612

JE 12:1 Comp (Race Gas) Part #208552

CP Carrillo 11.5:1 Comp (Pump Gas) Part #M2033

More payment options

🛠️ Complete 89mm 440cc Engine Rebuild Kit for Honda TRX 400EX/400X

Upgrade your Honda TRX 400EX or 400X with this comprehensive 89mm 440cc engine rebuild kit. Designed for models from 1999 to 2015, this kit enhances performance and reliability.

📦 What's Included:

New 89mm Cylinder: Precision-engineered for optimal performance.
89mm Piston Kit: Choose from Wiseco, JE, or CP Carrillo pistons with various compression ratios.
Hotrods Heavy-Duty Crankshaft with Rod: Ensures durability under high-stress conditions.
Complete Set of Motor Roller Bearings: Reduces friction and wear.
Comprehensive Seal and Gasket Kit: Includes all necessary seals and gaskets for a complete rebuild.
Cam Chain: Maintains proper engine timing.

🔧 Key Features:

Compatibility: Fits all Honda TRX 400EX and 400X models from 1999 to 2015.
No Machining Required: Bolt-on installation with stock or modified heads.
Fuel Compatibility: Pistons compatible with pump or race gas.
Warranty: All components come with the original manufacturer's warranty.

📦 Shipping Information:
This engine rebuild kit typically ships within 5–7 business days. We’ll notify you with tracking once it’s on the way.

💬 Customer Support:
Need assistance? Our team is available Monday through Friday, 7 AM to 4 PM PST, and our store chat is open 24/7 for quick questions anytime.

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.

If you call we answer, if you text we respond, if you have a question we respond. Sometimes we sleep so it could be next morning but we will respond.

Thank you for shopping with us! We appreciate you!

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Next: Honda TRX 400EX/400X 87mm 416cc Engine Rebuild Kit

Back to TRX400EX Complete Engine Rebuild Kits

Next: Honda TRX 400EX/400X 87mm 416cc Engine Rebuild Kit

No more ticking!

My 400ex has never sounded better. New tensioner, guides, and chain fixed the noise. Metal bottom end gasket was cool too, didn't rip while working on it.

Thank you for your positive review! We're glad to hear that the TRX400EX Cam Chain Tensioner & Wiseco Heavy Duty Cam Chain Kit was able to fix the ticking noise on your 400ex. We agree, these small maintenance steps can make a big difference in the overall performance and sound of your vehicle. We appreciate your feedback and hope to continue providing quality products for your ATV. Happy riding!

Yfz450

Well my mechanic said it was some good parts in the box. I'll let you know how the rebuild goes. Great I hope

I haven’t received them yet

Trevor, thank you for your 5 star review. We appreciate that. Rest assured I just checked your tracking info and UPS says they will arrive today between 1:30 & 3:00 pm. Your going to love the Lectron Carburetors!

Great quality and fast shipping thanks

Wrong gasket

I received the wrong center crankcase gasket

Hi there, thank you for bringing this to our attention. We apologize for the inconvenience of receiving the wrong gasket. We take pride in our products and want to ensure that our customers receive the correct items. We sell countless TRX400EX engine kits and we always ship the same gasket every time. In situations like this, we encourage our customers to reach out to us so we can rectify the issue. We would have been more than happy to ship out the correct gasket right away if you had sent us a picture of the wrong one. Please don't hesitate to contact us for any further assistance. Thank you for choosing our product.

Honda TRX 400EX/400X 89mm 440cc Engine Rebuild Kit

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