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Honda Engine Gasket for CB400SF Super Four, CB400T, CM400
Honda Engine Gasket for CB400SF Super Four, CB400T, CM400
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Product Overview
Ensure the mechanical integrity of your Honda with this premium engine cover gasket. Whether you are restoring a vintage CM400/CB400 twin or maintaining a high-revving CB400SF (Super Four) NC39, this gasket provides a professional-grade seal. Engineered to withstand high thermal loads and corrosive engine fluids, it effectively prevents oil seepage and maintains internal pressure for optimal performance.
Product Compatibility
This gasket is compatible with a wide range of Honda 400cc platforms, from classic cruisers to modern naked bikes:
| Series | Model | Chassis Code | Engine Type |
| CB400 Super Four | CB400SF / VTEC | NC39 (1999–2007) | 399cc Inline-4 |
| CB400 Twin | CB400T / CB400A / CB400C | Hawk / Hondamatic | 395cc Parallel-Twin |
| CM400 Series | CM400C / CM400T / CM400A | Custom / Touring | 395cc Parallel-Twin |
| CB400N | Super Dream | CB400N | 395cc Parallel-Twin |
Specifications
| Feature | Details |
| Engine Platform | Honda 400cc (Twin & Inline-4) |
| Material | High-Performance Interface Composite |
| Resistance | High-Temperature, Oil, and Chemical Corrosion |
| Fitment | Direct OEM Replacement |
| Application | Engine Cover / Crankcase Side |
Key Features
- Advanced Sealing Performance: Adopts high-performance materials that provide a reliable seal even in extreme engine environments, effectively preventing messy oil leaks.
- Thermal & Chemical Resistance: Engineered to resist the high heat and corrosive nature of modern synthetic engine oils, ensuring the gasket remains flexible and leak-proof over time.
- Extended Engine Life: By maintaining a perfect seal, this gasket prevents contaminants from entering the engine while ensuring vital lubrication stays where it belongs.
- Precision Manufacturing: Every gasket is precision-cut to match the complex curves of Honda engine casings, providing an exact fit for both vintage and modern NC39 models.
- Cost-Effective Maintenance: An essential part for any engine service or restoration project, reducing long-term repair costs by protecting your engine's exterior and interior.
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Fitment FAQ
Will this part fit my specific model and year?
This gasket set is intended for This gasket is compatible with a wide range of Honda 400cc platforms, from classic cruisers to modern naked bikes; Series; Chassis Code; Engine Type; CB400 Super Four; CB400SF / VTEC; NC39 (1999–2007). Key physical/spec details from the product data include 400cc, 399cc, 395cc. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. If your original part has a stamped OEM or manufacturer number, match that number first before ordering. For this gasket set, also compare the OEM number, gasket shape, hole pattern, engine model, bore size, and material thickness. This is especially important for Honda CB400T/CM400/CB400/NC39 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this gasket set for machines outside the listed compatibility, or for units with different bolt-hole layouts, water/oil passages, bore sizes, or engine castings. Model years outside 1999–2007, 1999, 2007 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, gasket shape, hole pattern, engine model, bore size, and material thickness. Recheck listed specs such as 400cc, 399cc, 395cc. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.