Additional NotesFully CNC machined flywheels made from a solid billet. Manufactured from our drawings to suit the 9 ½” 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. Can be used with either organic or ceramic clutch plate.