If it was my bike, id ask this, in the time it was riden did it seem to run correctly. Did it start to loose power or stumble before it stoped running? You can also do a resistance check across the positive and negative pole on the coil packs and the spark plug wire. There is a lot of testing you can do. If the bike sat for a long time its possible that the carbs had sediment in them and slowly or ubruptly cloged the jets. Do a search for a shop manual for the bike. If you cant find one by morning I should be able to find one for you. That will give better specificats then i am able to give.