'500' 

close up 

rear view '500' 

Dad's '500' 

Dad racing the '500' at Darley. 500cc. Formula 3. 4 valve Ulster Rudge 1939. Bronze head. Norton gear box. Keif style chassis. Free in roll rear suspension (rubber) 

Dad in the '500'. Track unknown. 

Dad in the '500' - track unknown 

Dad and Colin driving at Darley. 

Colin driving & Dad at Darley 

Colin Williams driving. Sidney 500. 543 lbs. 1939 Ulster Rudge Engine. 10/1 CR. Bronze head 4 valve. Norton gear box. Rudge front wheels & brakes. 2.LShoe. AJS rear wheels. 

Len At Darley Curcuit. Details: 500cc Formula 3. 4 valve Ulster Rudge 1939. Bronze head. Norton gear box Keif style chassis. Free inroll rear suspension (rubber) 10/1 CR. 96mph. weight 542 lbs 

No details with this '500' photo, looks like Bob Minogue 

Bob Minogue. ex Kavaner 500cc Norton (works) at Albury Weir in 90mph drift. 

I have no details on this, could be the '500' during Bob Minogue's time. 

Photos of Len Sidney's Ulster Rudge 500cc Special

The '500cc Sidney Special' underwent a few different guises.
Bob Minogue bought it, asking Len to fit a different motor
and other details I don't have at hand presently.
The archives are quite considerable, and will be looked
through eventually after I move house.