Advice please on how to modify my power steering as I think it's to light or touchy on my 1971 GS 350 . Thanks
The fitting in the back of the pump where the pressure line goes has a hole drilled in the center if it. The bigger the hole the easier the steering effort. U could change this to a smaller holed fitting and try that. Usually people want easier steering so they drill it out to the size that hydraboost trucks use. Also maybe try a larger pump pulley to slow down the pump speed.
Might pay to check your castor angle. Negative castor will lighten the steering, positive gives more effort, and better handling