Additional NotesFully CNC machined flywheels are made from a solid billet. Manufactured from our drawings to suit the race 7.25” twin plate clutch. They have 12-bolt fixing and are only suitable for our 12-bolt steel cranks COM238 & COM243. They are considerably lighter than the originals with as many lightening holes as possible machined into them to reduce weight. Will only accept a thin ring gear.