Name: Honda TRX 400EX/400X Wiseco 85mm Full Engine Rebuild Kit
Brand: AZ
SKU: WPC131A-1
Price: 892.0 CAD
Availability: InStock

Honda TRX 400EX/400X Wiseco 85mm Full Engine Rebuild Kit

$892.00

Shipping calculated at checkout.

Select Year

1999-2004 Part #WPC131A

2005-2015 Part #WPC131B

🛠️ Complete 85mm Wiseco Engine Rebuild Kit for Honda TRX 400EX/400X

Restore your motor from top to bottom with this full Wiseco rebuild kit — designed for performance, reliability, and easy bolt-on installation. Everything is brand new, OEM compatible, and ready to install with no machining required.

✅ In Stock – Ships within 24 hours!

📦 Kit Includes:

Brand New 85mm Cylinder – Stock bore, ready to install
Wiseco Bottom End Rebuild Kit – Includes crankshaft, rod, main bearings, and gasket/seal kit
Wiseco 10:1 Piston Kit – Complete with rings, wrist pin, and clips
Cometic Top End Gasket Set – Includes head, base, exhaust, and timing gaskets

🔧 Key Features:

Fits all Honda TRX 400EX & 400X models
10:1 piston runs on pump or race fuel
No machining required – direct bolt-on rebuild
All parts are new in original packaging
Covered by Wiseco and Cometic manufacturer warranties

📦 Shipping Info:
Ships within 24 hours from our warehouse. Tracking sent immediately after fulfillment.

💬 Customer Support:
We're here Mon–Fri, 7 AM to 4 PM PST, and our live store chat is open 24/7 for quick help 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!

[{"id":46338019655905,"title":"1999-2004 Part #WPC131A","option1":"1999-2004 Part #WPC131A","option2":null,"option3":null,"sku":"WPC131A-1","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Honda TRX 400EX\/400X Wiseco 85mm Full Engine Rebuild Kit - 1999-2004 Part #WPC131A","public_title":"1999-2004 Part #WPC131A","options":["1999-2004 Part #WPC131A"],"price":89200,"weight":6804,"compare_at_price":null,"inventory_management":null,"barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]},{"id":46338019688673,"title":"2005-2015 Part #WPC131B","option1":"2005-2015 Part #WPC131B","option2":null,"option3":null,"sku":"WPC131A-2","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Honda TRX 400EX\/400X Wiseco 85mm Full Engine Rebuild Kit - 2005-2015 Part #WPC131B","public_title":"2005-2015 Part #WPC131B","options":["2005-2015 Part #WPC131B"],"price":89200,"weight":6804,"compare_at_price":null,"inventory_management":null,"barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}]

Dune Goons Clothing

Dune Goons children's clothing in any color and any size with any logo. Just contact us for custom orders. We love people that wear Dune Goons!

Dune Goons Apparel

Next: Honda TRX 400EX/400X 85mm Full Engine Rebuild Kit

Back to TRX400EX Complete Engine Rebuild Kits

Next: Honda TRX 400EX/400X 85mm Full 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 Wiseco 85mm Full Engine Rebuild Kit

Customer Reviews

Dune Goons Clothing

Dune Goons children's clothing in any color and any size with any logo. Just contact us for custom orders. We love people that wear Dune Goons!

You may also like

Check us out on Facebook

Check out our Instagram!

"Dune Goons Forever"

Let customers speak for us