Dominator engine with rephased one piece crank to simulate V twin characteristics, reduces vibration and increases power. Electronic ignition cams to suit. rephased crank . Aluminium barrel ,the head is from a 650 ss . Engine has only run on the Dyno. The engine comes with Amal TT carburettors and the exhausts. if there was enough inquiries I would consider breaking the engine Due to weight and awkward item to box we would prefer buyer to collect. If you have any queries please contact me.