my 2p worth -get the fiamm ones from halfwits if you go with the single unit you get a high (peep)or a low tone unit(a proper'beep') if u get the kit with both and the relay they sound very loud together and theyr easy to fit ,if ure gonna go to the bother of changing the unit get they bad boys and ull b well chuffed ,i guarantee it.ps they fit lovely on a faired curvey,on a naked bike it may b hardr to find a suitable mounting for them ,for a naked i would just get the one unit as its less work and itll prob b neater
