Tyre pressures

Ask the maker of the tyres, their technical dept should be able to calculate based on the bike and rider weights, ignore whats in the handbook as sidewalls are not the same and pressures are higher.

hello the book says  22 lb front and 23lb rear  but you need that bit extra  if you are heavier or are putting a heavy pack on the machine,   yours  anna j    

Which book?  My manual (Models 88 & 99 1951-´62) says 25lbs. front, and 20lbs. rear.   However, back in the 50´s, (when I rode flat out everywhere!) I ran 30lbs. front and 24 rear.  I found this cured a slight weave over 80 m.p.h.

... the book pressures are for the old hard tyres which were around when the bike was new. Modern tyres usually need around 28 / 32  front / rear for many bikes but as John Holmes says ask the tyre manufacturer.