need help with my ninja

some one gave me a ninja its a 90 or 91 its a 750 and the guy i got it from said it just need a new carb and i took the old one out its keihin and i got the part number and everythign but there website is no help anyone know where i can find a new carb and im still trying to find out what model my bike is it does not say it nowhere on my bike thanks

It's probably the last thing you wanted to hear, but you are probably best off just going to a shop and seeing what they have to say... :redface:

Look for a sticker or plate attached to the frame or find a at least find a VIN. Post it or PM me with what you find at the very least I can tell you what year it is.