Honda XR400 XR 400 86 87 88 89 416 440 Big Bore Cometic Top End Gasket Kit C7826

🧩 HONDA XR400 / 400EX / 400X COMETIC 89MM BIG BORE TOP END GASKET KIT – C7826

Fits XR400R / TRX400EX / TRX400X – All Years – 86mm to 89mm Bore

Seal in unbeatable compression and top-end reliability with this Cometic USA-Made C7826 Gasket Kit—perfect for 416cc, 426cc, or 440cc high-performance rebuilds.

Built for extreme conditions and high compression, this kit delivers rock-solid sealing under full throttle abuse, race heat, and aggressive riding.

✅ Kit Includes & Benefits

- Complete Cometic Top End Gasket Kit
- Includes high-performance MLS (Multi-Layer Steel) head gasket
- Works for big bore sizes: 86mm, 87mm, 88mm, 89mm
- Ideal for 416cc, 426cc, 440cc rebuilds
- Perfect for high compression pistons
- Part # C7826 – UPC: 191070011307
- Made in the USA

📦 Fitment Guide

Honda (ATV)

    TRX400EX Sportrax (1999-2008)

    TRX400X (2009, 2012-2014)

Honda (MC)

    XR400R (1996-2004)

⭐️ Why Buy from BPRATV?

We’ve sold thousands of these kits—trust our experience and expertise to power your rebuild right.

❓ Frequently Asked Questions

Q: Will this fit my 2002 TRX400EX with an 87mm piston?
A: Yes! This kit is made for 86–89mm big bore top ends.

Q: Is the head gasket in this kit MLS?
A: Absolutely. This kit includes a Multi-Layer Steel head gasket for superior sealing.

Q: Can I use this with a stroker crank?
A: Yes, it's compatible with big bore + stroker setups (416–440cc).

Q: Is this kit made in the USA?
A: Yes—Cometic is proudly manufactured in the USA.