Honda XR400 TRX400 Top End Cylinder Kit Stock Bore
- Complete top end kit for Honda XR400 and TRX400EX models
- Stock bore 85mm piston with 10:1 compression ratio
- Includes gaskets, rings, wrist pin, and spark plug
- Moly coated piston for durability and reduced friction
- Manufactured to OEM specifications for proper fit
Honda XR400 and TRX400 Top End Cylinder Kit – Stock Bore Performance
Restore power and reliability with this complete 50 Caliber Racing top end cylinder kit designed for Honda XR400 and TRX400EX models. Built to OEM specifications, this stock bore kit provides proper fitment, dependable performance, and long service life. It is an ideal solution for riders looking to rebuild worn engines and bring back factory performance.
This kit includes all major components needed to complete a top end rebuild, helping reduce downtime and eliminate the need to source parts separately. The included moly coated piston helps reduce friction and heat while supporting durability and smooth engine operation. Designed for straightforward installation, this kit allows you to complete your rebuild with confidence.
Whether you are maintaining your trail machine or restoring performance, this complete top end kit is engineered for consistent reliability and long-term use.
Kit Includes
- Cylinder jug
- Moly coated piston – 85mm, 10:1 compression
- Piston ring set
- Circlips
- Wrist pin
- Spark plug
- Complete gasket set
Fits the Following Honda Models
- XR400R (1996–2004)
- TRX400EX (1999–2009)
Designed for durability and ease of installation, this top end rebuild kit helps extend engine life and restore dependable performance.
