If it's not starting, while you have the float bowls off make sure the choke jets in the floatbowls are clear if they were as bad as you say. Try and get some carb cleaner to spray in the jets too make sure they are clear. While you have the floatbowls off check the size of the Main jets as in the Data book it says the outer carbs 1 & 4 should have a #105 main jet and the two inner carbs 2 & 3 should be #102.5
Although this shouldn't affect starting it's still worth checking incase a previous owner mixed them up.