Perplexing panning.....

The annual Harley Davidson meet in Baildon today and a great op to dabble in some panning.  I've never tried it before but thank you to everyone who gave advice on the blipfoto friends' facebook page.... I think I tried eeeeeverything!! :))
So - my best effort - with fallen crest......... F11, 1/60 - auto ISO 320..... continuous focus... smooth upper body swerve action (ish), set focus on the road and then tried on the bikers themselves..... ho hum...... it aint easy (or is it me!)... but what fun :)))