SOHC 11/32" Model 30\40 (and 30M/40M - Manx Type) Inlet Guide - Each

These high quality valve guides are made to the original dimensions of SOHC Norton valve guides - this being the inlet which are bored to take the standard 11/32" diameter inlet valve.  

The valve guide is made with the important oil feed - which has a small countersunk face to allow for a better tolerence when fitting them.

Both this and the exhaust guide are designed to take the standard Norton International 30\30M (and 40\40M) inlet valve spring holder collar, which we also sell - item 0318. This slides over the top face of the guide and provides a mount for Hairpin Valve Springs (which we also offer).

This type of Valve guide was fitted to most SOHC models - with both Cast Iron, Bi-metal (bronze skull and alloy fins), and fully alloy heads.  It should fit both round fin and square fin heads (i.e. early Manx), where 11/32" valves were used.   

These guides are CNC machined with the original dimensions - includig the original interference fit tolerance on the outer diameter.  As per normal practice - cylinder heads should be warmed to allow for easier removal of old guides and fitting of new (and we recommend putting guides in a freezer for at least 10 mins before fitting, to help with this).

Price is per single guide. 

Update April 2023:  A new batch of these now in stock.  Please note - the price of Phospher Bronze has risen hugely in the last 3 years since our last batch - but we have tried to stay close to the previous price.