SOHC (Model 30M/40M) Bottom Magnesium Bevel Casting and Plain Bearing

- Magnesium SOHC (Manx Spec) Bottom Bevel Casting, as fitted to pre-war Works bike, and occasionally some Pre and Post-War customer (i.e.Gardengate) Manx's, these bevel castings will give your engine a particularly exotic touch, as well as being substantially lighter than their aluminium equivelants.

Made from high quality AZ91E, heat treated magnesium alloy - comparable to Norton's original Elektron material), they are made to exact copy of original castings and UK CNC machined.. The casting is supplied fully chromated (to protect from oxidisation) as per originals, but also sprayed in Duck Oil.

Finally, they are pre-fitted with the plain phospher bronze bevel gear bearing, which has all oil grooving as per original, and is pinned and honed after fitting, just as the original. (

June 2023:  FYI - the last magnesium casting sold approximiately one year ago, and the price of magnesium and machining has risen hugely since pre-covid (i.e. the price showing will be out of date).  Realistically, it is unlikely we will manufacture these again in magnesium - but email if you really want them - if enough interest, we may consider a final batch