Namura Top End Rebuild Kit – Honda TRX400EX / XR400R / TRX400X (11:1, Std Bore 84.97mm)
Namura Top End Rebuild Kit – Honda TRX400EX / XR400R / TRX400X (11:1, Std Bore 84.97mm)
Upgrade your Honda 400cc engine with this high-compression Namura Top End Rebuild Kit. Designed for serious riders, this 11:1 compression kit offers increased performance and durability with a stock bore of 84.97mm. Ideal for riders looking to restore lost power or squeeze more out of their build without major mods.
What’s Included:
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MOS2-coated piston (84.97mm STD bore, 11:1 compression)
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Piston rings
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Wrist pin
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Circlips
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Top end bearing
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Complete top end gasket kit
Fitment:
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Honda TRX400EX Sportrax: 1999–2009
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Honda XR400R: 1996–2004
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Honda TRX400X: 2012–2014
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
