Magneto/dynamo drive sprocket, 16/80

This sprocket forms the lower cog for the timing chain and is a push fit onto the crankshaft. Care is needed to retain the original woodruff key or a new one is needed. This cog is an interference fit and some gentle heat might be needed if a press is not available. Care is also needed to replace it in the correct orientation It is generally recommended that the whole timing system be replaced (ENG107, ENG108, ENG120) at the same time as replacing ENG109.