Crankshaft Timing Disc Tool - Plastic Type (Each)

This is a very useful tool, that no workshop should be without - a plastic circular valve/ignition disc, with hole that can be opened out to suit all Norton singles. 

Price is Each

These plastic discs can be attached to the end of the crankshaft, and a piece of welding wire turned into a needle against the circumference - with degrees marked all around the disc - they are invaluable for setting both valve and ignition timing.  Even better if you buy a sheet of alloy plate and glue one of these discs to the plate to make them stronger.  I always keep a couple like this around the workshop.