Apico Alloy Fuel Caps for trial bikes have a built-in breather and one-way valve to stop fuel leaking from the petrol tank.
Available in various anodised colours to suit the bike manufacturer and Apico laser-etched logos.
The fuel cap comes with an O-ring fuel seal as they would OEM and fits 250-300 from 2018 onwards and 125 from 2019 onwards