Reply To: Marzocchi Fork Springs Great British Handcrafted Motorcycles › Forums › CCM Motorcycles – General Discussion › Marzocchi Fork Springs › Reply To: Marzocchi Fork Springs 19 June, 2022 at 1:13 pm #12206 martin G10Member Hi, Andy Who calls it air displacement, special tools ? Usual tools are a tall measuring jug for a dry ish build (known amount of oil) and add a large syringe with tube for setting an air gap ! (wet , swapping springs , oil) regards martin