Name: TRX400EX 85mm Top End Kit WSM
Brand: Dune Goons
SKU: DGS-400EX-85MM-TOP
Price: 420.0 CAD
Availability: InStock

TRX400EX 85mm Top End Kit WSM - Dune Goons

TRX400EX Engine Rebuild Kit 1999–2004 | Wrench Rabbit WR101 - 192 - Dune Goons

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$420.00

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Looking to rebuild your 400EX top end without spending a fortune? Whether you're chasing reliability or performance, this kit delivers everything you need to get back on the trail fast - without cutting corners.

✓ Fits:

1999-2008 Honda TRX400EX
2012-2014 Honda TRX400X
Also fits earlier models with 85mm standard bore setup

✓ Features:

TRX400EX 85mm Top End Kit WSM

✓ What's Included:

WSM Piston Kit (0903-1351 / 54-228-10) - 10:1 pump gas piston
Forged piston, rings, pin, and clips
WSM Complete Gasket Kit
Head, base, intake, exhaust, and oil seals
Bonus - WSM Oil filter included.

Ships fast from DuneGoonShop!

📦 Shipping Information

In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.

Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.

Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.

Questions? Contact us, we respond within 24 hours.

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