SOHC Model 30M/40M SOHC Manx Camshaft

Product no.: 0056 A11M/790

In stock

£205.00
Recommended Retail Price, plus delivery


SOHC Camshaft to fit all central oil feed racing camshaft engines - This camshaft has provision for a central oil feed, as used on racing and competitionengines. 

This type of SOHC camshaft differs from the solid type, in that is bored through the centre allowing for a central oil feed directly onto the lobe of the cams.  This is the correct fitting for SOHC cambox's that have provision for the central oil feed on the front bevel cover.

It should be noted that early competition cambox's are identifiable by having the central oil plunger boss, but the castings are in aluminium.  However, with the introduction of magnesium for competition bikes in approximately 1935-36, it is more normal for this type of camshaft to be used on magnesium cambox's, where the front bevel cover was also magnesium and always came with the central oil plunger boss.  This 'competition' type of cambox is easily identifiable from roadgoing cambox's in that the oil feed union uses the lower of the two bosses cast into the cambox, while the non-central feed road going type uses the upper boss.  It is possible to drill oilways into a roadgoing cambox to give a central feed, but it is not an easy job to do and requires being very careful to ensure oilways are drilled in line with a central feed front bevel cover (which we do offer in magnesium)

It is possible though to use this central oil feed type camshaft in a standard Inter cambox, providing the original roadgoing oil supply is used - although it offers no real benefit, other than saving a fraction of weight.

Final point on SOHC magnesium cambox's with central oil feed: it seems that nearly all later roadgoing International's were fitted with the magnesium cambox with central oil feed - particularly Featherbed models.  This was probably because Norton had moved over to DOHC engines for racing from 1951 and had stocks of their SOHC Manx cambox's still in stock to use up.  If you are unsure if your cambox is this type, and want to check before purchasing - email us at sales@racingvincent.co.uk

 

Customers who bought this product also bought

*
Recommended Retail Price, plus delivery

Browse this category: 1.d Norton SOHC Cambox