TRX 400EX 400X Sportrax 87mm 89mm Big Bore Head Gasket Cometic +4 Cylinder Top
Cometic MLS head gasket for Honda TRX400EX, TRX400X, XR400R big bore engines. Supports 87–89mm bores with race-proven sealing.
Cometic Honda TRX400EX TRX400X XR400R 87mm–89mm Big Bore MLS Head Gasket
📖 Product Description
The Cometic MLS Cylinder Head Gasket is precision-engineered for Honda TRX400EX, TRX400X, and XR400R engines running big bore kits. Built to withstand extreme cylinder pressures, this multi-layer steel gasket delivers race-proven sealing performance, long-term reliability, and consistent compression for aggressive riding and closed-course competition.
🔥 Key Features & Benefits
Manufactured in the USA using premium materials, this MLS head gasket is designed specifically for high-output Honda 400 engines with increased bore sizes.
- High-strength 3-layer MLS construction for superior sealing
- Supports 87mm, 88mm, and 89mm big bore configurations
- .027 inch compressed thickness for stable compression ratios
- Round bore design for uniform combustion sealing
- Ideal for high-compression and performance engines
✅ Compatibility
Designed for Honda 400 platforms using stock or aftermarket big bore cylinder kits.
- Honda TRX400EX Sportrax (1999–2008)
- Honda TRX400X (2009, 2012–2014)
- Honda XR400R (1996–2004)
- Fits 86mm, 87mm, 88mm, and 89mm big bore kits
- Cometic Part Number: H0402027S
❓ Frequently Asked Questions (FAQ)
-
Q: Is this gasket designed for big bore engines?
A: Yes, it is specifically engineered for Honda 400 big bore applications up to 89mm.
-
Q: Can this be used on high-compression or race engines?
A: Absolutely. The MLS construction is ideal for high-compression and race-focused builds.
-
Q: Does this gasket require special installation?
A: No special procedures are required, but proper surface prep is critical for MLS gaskets.
-
Q: Where is this gasket made?
A: This Cometic gasket is proudly Made in the USA.
🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We source only proven, high-quality components like Cometic to ensure your Honda 400 engine performs at its peak. Trust BPRATV to keep your ATV or motorcycle running at its best, every single time.
Upgrade your Honda 400 engine today with Cometic MLS sealing performance.
BPRATV - The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!
© BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.*
Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express or implied warranty. Installation may void manufacturer warranties and may be illegal in some locations. This product is intended for closed-course, nonroad competition use only and is exempt from applicable EPA and California emissions regulations.
