Top End Gasket Kit – Honda TRX400FW Foreman 4x4 (1995–2003)

Top End Gasket Kit for Honda TRX 400FW (1995–2001). This aftermarket replacement gasket kit is designed for a complete top-end rebuild, delivering reliable sealing under high engine stress and helping to restore original compression and performance. Manufactured by Aftermarket Replacement, the kit provides the gaskets typically required for a precise, durable top-end seal, ensuring consistent engine reliability across the TRX 400FW model years 1995 through 2003.

Comprehensive Vehicle Fitment

Fitment confirmed for Honda TRX400FW Foreman 4x4 models from 1995 through 2003 .

Product Specifications

 

OEM Cross-Reference Information

*OEM cross-reference numbers are provided for reference purposes only. These part numbers are confirmed for 1995-2003 TRX400FW Foreman models through multiple aftermarket and OEM sources . Always verify fitment using your machine's exact model, year, and original part number before ordering.*

What's Included

Based on standard top-end gasket kits for the TRX400FW engine, this kit typically includes:

• Cylinder head gasket (replaces OEM 12251-HM7-004)

• Cylinder base gasket (replaces OEM 12191-HM7-013)

• Cylinder head cover gasket (valve cover) (replaces OEM 12315-HM7-005)

• Exhaust gasket(s) (replaces OEM 18291-MN4-920)

• Valve stem seals

• Related O-rings and seals as required for complete top-end sealing

Note: Complete top-end rebuild kits from leading aftermarket manufacturers may include additional components such as pistons, rings, wrist pins, and circlips . This listing is for the gasket kit only unless otherwise specified.

Why Choose This Aftermarket Top End Gasket Kit?

• Direct-Fit Compatibility: Precision-engineered for Honda TRX400FW FourTrax Foreman 4x4 models spanning 1995 through 2003 .

• OEM Cross-Reference: Cross-references genuine Honda part numbers 12251-HM7-004, 12315-HM7-005, and 12191-HM7-013 for confident replacement .

• Proven Aftermarket Support: Multiple respected aftermarket brands manufacture compatible gasket kits:

  • Cometic Gasket offers top-end gasket kits (Part No. C7301) specifically for 1995-2003 TRX400FW models, featuring perforated steel core head gaskets with elastomer coating and aramid fiber base gaskets

  • Vertex Pistons provides top-end gasket kits (Part No. 810858) for 1995-2003 TRX400FW applications, containing head gaskets, base gaskets, O-rings and seals for complete top-end rebuilds

  • Winderosa supplies top-end gasket sets (Part No. 810858) with positive customer reviews confirming perfect fit for 1997-2003 TRX400FW models

• Premium Materials: Head gasket features perforated steel core with elastomer coating for superior sealing under high heat and pressure; base gasket constructed from durable aramid fiber .

• Restores Compression: New head and base gaskets ensure proper cylinder sealing for optimal engine performance.

• Prevents Leaks: Complete sealing kit prevents oil seepage and maintains clean engine operation.

• Note on Valve Cover Gasket: Some aftermarket kits may not include the formed rubber valve cover gasket, which may need to be ordered separately .

Installation Notes:

• Ensure all mating surfaces are clean and free from old gasket material before installation.

• Follow manufacturer torque specifications and tightening sequences for cylinder head bolts.

• Use new gaskets only—do not reuse old gaskets once removed.

• Check valve clearance after head installation and adjust if necessary.

• After installation, run the engine and check for any signs of leaks.

• Verify whether your specific kit includes the valve cover gasket, as some aftermarket kits exclude this component .

Why Upgrade?
Worn or damaged gaskets can cause compression loss, oil leaks, and contamination—leading to poor performance and potential engine damage. Restore your Honda TRX400FW Foreman engine's sealing integrity with this quality aftermarket top end gasket set, designed to keep you riding with confidence.

Order your top end gasket kit today and get back on the trail with confidence.