1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13111-KCY-670, 12251-HN1-003, 12209-KL4-005, C7825, 808894, 822278, 4040, 4606M08700, C7826, H0402027S, 4606M08800, 4667M08900, 808829, M2033, 8604DA

TRX400EX / 400X 87MM +2MM BIG BORE REBUILD KIT

Complete Top End Assembly Fits All Honda 400EX, 400X, XR400 Models

If you’re rebuilding your Honda 400 and want more power, more durability, and the peace of mind of a full warranty, this is the most complete, high-quality kit on the market period.

We’ve sold thousands of these TRX400EX rebuild kits across all sizes 85mm, 86mm, 87mm, 88mm, 89mm and we proudly stand behind every one. Your kit includes everything needed for a high-performance, no-compromise top end build with a 1-year warranty and lifetime tech support.

Kit Includes:

– 87mm Nikasil Big Bore Cylinder (1 Year Warranty)
– Wiseco, JE, CP Carrillo, or Wossner Forged Piston*
– High-temp piston rings
– Wrist pin and circlips
– Talon Titanium Head Stud Kit (Lifetime Warranty)*
– Cometic Big Bore MLS Top End Gasket Kit
– Heavy Duty Timing Chain
– Full 1-Year Warranty on Entire Kit*

Fits the Following Models:

– TRX 400EX (All Years)
– TRX 400X (All Years)
– XR400 (All Years)

Why Buy from ?

The Best Parts. The Best Performance. The Best Price.

BRAPPPPPPPPPP!

No one supports 400EX owners better than we do. Trusted by builders, riders, racers and backed by real warranty & tech help.

Build it Right the First Time

Better performance, stronger parts, no cut corners. This kit delivers everything.

Frequently Asked Questions

Q: Will this work on my 2003 TRX400EX?
A: Yes this kit fits all years and models of TRX 400EX, TRX 400X, and XR400.

Q: Do I need to modify anything?
A: No the kit is drop-in ready with OEM-fit components. Tuning recommended.

Q: Which piston brand comes with the kit?
A: We include a top-tier forged piston from Wiseco, JE, Wossner, or CP depending on current availability.

– The Best Parts. The Best Performance. The Best Price. BRAPPPPPPPPPP!

LLC