Hi YMFB,
Having been the proud owner of two ST4's, I can say that you are looking at around £200 for the first/alternate service and the upper end of £400 for the second/main service. Expensive I know but she's worth it! I found that a lot of the expence comes from the time taken in the removal and refit of the fairings. Not It's best point.
I would seriously recomend Moto Rapido in Winchester (where I purchased my second steed from) and If you are prepared to go a little further Snells in Alton are excellent. Both services should be complete within the day. I would be very surprised if it took any longer!
Hope you get sorted soon.
