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New 89MM Big Bore Top End Gasket Kit set for Honda TRX400EX TRX 400EX 440 Nice
$27.99
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$27.99
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In Stock
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I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
New 89MM Big Bore Top End Gasket Kit set for Honda TRX400EX TRX 400EX 440 Nice
Upgrade your engine's performance with this high-quality 89MM big bore top end gasket kit. This premium aftermarket kit is designed specifically for big bore conversions, providing a reliable seal to handle the increased power and heat of your modified Honda TRX400EX. Whether you are rebuilding your engine or performing a 440cc upgrade, these gaskets ensure a precise fit and long-lasting durability for your off-road adventures.
Key Features & Benefits
- Designed specifically for 89mm big bore engine configurations
- Provides a superior seal to prevent leaks and maintain high compression
- Constructed from high-grade materials for excellent heat resistance and longevity
- Complete top end set including head and base gaskets for a comprehensive rebuild
- Cost-effective aftermarket solution without compromising on quality or fitment
Compatible Models
- Honda TRX400EX Sportrax (Big Bore 440cc Conversions)
- Honda TRX400X (Big Bore 440cc Conversions)
Product Specifications
- Bore Size: 89mm
- Part Type: Top End Gasket Kit
- Condition: Brand New
- Fitment Type: Performance Aftermarket
Frequently Asked Questions
Is this an OEM part? No, this is a high-quality aftermarket replacement part designed to meet or exceed the performance of the original equipment.
How do I confirm compatibility? This kit is specifically for TRX400EX models that have been bored out to 89mm (typically 440cc kits). Please verify your cylinder bore size before ordering.
Important: This is an aftermarket replacement part sold by Northline Parts. It is not made by the original equipment manufacturer unless specifically stated. Brand names, model names, and part numbers are used only to identify compatibility. Please compare your original part, photos, and fitment details before ordering.
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Service was professional and easy to work with. They kept me updated on my order and recommended a different part when the one I originally picked wasn’t going to work. Everything showed up as expected and the process was smooth overall.