LEGUNDARY Custos Coolant Cap Silver for KTM 250 Adventure — Billet Reservoir Cap

The stock plastic coolant reservoir cap does its job and looks exactly like what it is — a cheap moulded cap sitting in an otherwise well-finished cockpit.

The Custos cap replaces it with a machined billet unit that threads into the same reservoir neck, adding a bit of finish to the tank area without touching the cooling system's sealing performance.

A straight drop-in swap for the factory cap — no tools beyond a simple twist to fit.

What it does:

• Replaces the plastic stock coolant cap with machined billet
• Direct thread-fit onto the factory reservoir neck
• Adds a finished, custom look to the tank area

Key details

• Brand: LEGUNDARY
• Material: Billet aluminium, silver finish
• Fitment: KTM 250 Adventure / 390 Adventure Gen2
• Mount type: Thread-in, direct replacement