SOHC Camshaft Spacer Ring

This is the distinctive slotted spacer ring that fits over the camshaft in the tunnel area between the front (bevel gear) chamber and the rear (cam) chamber. On racing cambox's that employ the centrally fed camshaft oilway, this is no more than a spacer ring, however, for the road going type cambox, which uses a solid camshaft, this spacer ring is very important as oil is fed to the cam chamber along the slot. For this reason, there is a slight lip one one end, to ensure the bush can only be fitted in one direction