
VERTEX steel intake valve, manufacturer reference 8400003-2, designed for Honda XR400R. Replacement part intended to restore the intake circuit and the sealing of the cylinder head on single-cylinder off-road motorcycles.
This valve is designed to replace the original part on XR400R engines. It directly affects the timing system: stem, valve seat, and cylinder head sealing. Ideal for maintenance, cylinder head refurbishment, or replacement due to wear, it allows for restoring operating values in accordance with original specifications when the valve clearance is properly checked and adjusted.
Main compatibility: HONDA XR 400 R (NE03) ā models 2002, 2003, 2004 (400 cm3). Check the reference and year before installation to ensure compatibility. Installation is recommended by a professional or an experienced individual, with verification of the valve seat, guides, and adjustment of clearance after installation.