This is our Hawker oil pump for Ariel single cylinder bikes. This pump has no overhauled parts in it, it is completely new. It increases oil flow without overly increasing oil pressure. In tests it has an increased flow rate of over 50% than that of standard. There are no modifications required to make to the engine to fit this pump. It comes complete with duralamin block, screws, gasket and length of clear pipe for testing. These pumps are tested on our test bed for a minimum of 30 minutes (see our video for exactly how we do this!)