you need to find out exactly what year R1 they came off then just source the parts from the net or your local bike shop. i was lucky in that i have zx750r carbs and they used the same ones during that bikes production, but i can get an entire set for £70 off fleebay, so parts should be a piece of piss. (just dont EVER ask which are better, bike carbs or webbers, that shit storm takes ages to go away, hahaha)