It was a 130 E07 on my G/S.
There is a post on this thread by Mitas which gives their recommendations for Knobs / E09s run on the bitumen / at high speed and from memory it was 10/15 lbs higher than what most people seem to suggest - around the 40 lb mark.
On dirt just suit yourself, but as far as tire life is concerned higher pressure is usually better.
Adelaide Hills, Australia. 93 R100 GS, 77 R75/7 ,70 BSA B44VS, , 86 R80 G/S PD, 95 BMW Funduro F650 ST