Flipped YFZ/ Wont Start

[Black250EX]

i need some help. ok this is wat happened my uncle was riding his new yfz and was doin donuts in the sand some how he managed to flipp his quad and now it wont start what do u think it is that is causing this problem?

[HiperEX]

i would say it may be flooded or check your battery connections i was riding my rap once doing doughnuts all teh sudden it dies couldnt figure it out so popped teh seat of sure enough the bolts on teh battery worked loose