how much do you rekon a decent low milege (5K) 1300cc hayabusa engine would cost? and how much would i get for my engine 2.0 16v 172bhp (9K). Also how much would it cost to fit a turbo too the bike engine and what bhp would i be looking at then? would this be faster than the standard 172 given its light weight 4cyl ? would this be cheaper to do than fitting/purchasing £6000 ktec turbo ? im thinking it would.. but would the performance gains be simular?