Yup, fatduke you beat me...but then you have got an ST4 so you should be quicker
Forgot to mention Simon, about the easiest thing you can do to tidy the back end up is to remove that vast rear mudguard extender that ST2's have as standard - you'll know it when you see it, it's nearly the size of a shovel.
Grope about under the rear find the two or three fixing screws, take it off and throw it in the shed for resale time. There you go - five minutes maximum and costs nowt