Combine it with
The flush cap fuel line has a one-way valve that allows air to enter but prevents fuel from escaping when the bike is upside down.
Dell'Orto PHBL 26mm carburettor. This carburettor is the most common carburettor on trial bikes and has been used successfully for decades. It offers excellent performance throughout the entire rev range. High idle speed of 120 and low idle speed of 35.