Honda 400EX / 400X / XR400R 87–89mm Big Bore Head Gasket | Cometic (1996-2014)
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Honda TRX400EX / TRX400X / XR400R 87mm–89mm Big Bore Head Gasket (Cometic)
🛠️ Description
Upgrade your Honda 400EX, 400X, or XR400R engine with this Cometic MLS head gasket designed for big bore applications. Whether you’re running an 86 mm stock bore or pushing up to an 89 mm big bore cylinder, this gasket delivers a precise seal and dependable performance. Built in the USA with multi-layer steel (MLS) construction, it’s a trusted solution for serious riders and builders.
✅ What’s Included
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(1) Cometic MLS 89 mm head gasket kit
📦 Fitment
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Honda Sportrax 400 TRX400EX 2x4: 1999–2008
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Honda TRX400X 2x4: 2009–2014
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Honda XR400R: 1996–2004
🛡️ Warranty Info
Manufacturer’s limited warranty against defects in material and workmanship.
🔑 Key Features
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Works with 86 mm – 89 mm bore sizes
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Multi-layer steel (MLS) for maximum sealing strength
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Engineered to handle increased compression and performance builds
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Made in the USA
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
