How expensive is taxi insurance?

Im 19 and merely passed my cycle check. Im trying to find my first 'activities' motorcycle (fully faired) with quite a directed along operating position. I'll be limiting the bike to 33bhp (but-don't get that into account). Around the 600/ mark that is 650cc. Whilst a problem again. What activities cycles are cheapest to cover? Thanks.
"Thus"What goes on if you rest to a motor  insurance   firm about your traffic violations