Front spindle is a 28mm (not 27mm) , rear wheel side as you say is 46mm and the sprocket side if I remember correctly is 41mm (easy enough for me to check when I get home from work)
some of the tool stores at the bigger auto jumbles sell them.
Can any one recommend any learning schools to help me get to know my bike and learn to ride it 'as it should be ridden'. I would much prefer to get this experience on a track where its much safer rather than out on the road. I class my self as a 'fair weather rider' and have previously ridden the bike to to pose around in.
All suggestion welcome (I hope no one recomends the CBT again)