Ducati ST Series Lower Yoke Triple Clamp Steering Stem Assembly Genuine OEM For

This listing is for a genuine Ducati cast aluminum lower yoke, also known as a lower triple clamp or steering stem assembly, with Ducati Factory Part Number: 342.3.014.1A. This assembly was designed by Ducati with an updated lower plate footprint to accommodate thicker front suspension gear. This makes it directly compatible with: * Ducati ST4 / ST4S (All model years: 1999–2005) * Ducati ST3 / ST3S (All model years: 2004–2007) * Ducati ST2 (Late-generation models only: 2000–2003, following factory upgrades to the front chassis parameters) Important Fitment Note: This clamp features 54mm lower fork clamping bores, configured to secure standard 43mm fully adjustable Showa front fork legs. It is not suitable for the earliest 1997–1999 ST2 machines, as those early versions used smaller 53mm lower clamps for non-adjustable forks. Condition Details: * Heavy Stem Surface Rust: The main steel vertical steering stem shaft exhibits a distinct, thick layer of dark brown surface rust and scaling oxidation over its entire span from weather exposure. * Damaged Lower Bearing / Seal: The lower head race roller bearing structure at the base of the stem is completely seized, rusted out, and is missing its structural cage components. The rubber base ring dust seal is cracked and shredded. * The Good News: The main aluminum triple clamp cross-plate itself is structurally solid and straight. The dual fork pinch-bolt eyes are round, intact, and show no cracks. The top locking threads on the stem tip remain functional but will require cleaning with a wire brush.