I have a 2003 Zr7S UK model, had from new but only done 1300 mile, used for 12 months then sat there under cover until now, completly stock model, no mods at all. I've done all the usual, new plugs, cleaned the carbs, checked cleaned the jets etc, new battery. The bike does start with the choke fully on but sounds rough, like not firing on all four, if I give some throttle it dies, if I reduce the choke it dies, I won't start at all with out choke even though the engine is hot, I did notice when refurbing the carbs that two of the heaters had broken off wires but surely that wouldn't be the issue would it?, other than that I can't find anything else wrong, all four plugs are sparking, any help, thanks