I have a 2006 dyna wideglide that has a mysterious rattle coming from the handlebar/triple tree area.I dropped the bike in a turn (10 mph) and there is also a bit of play in the bars now.Any thoughts?

 

The bars are mounted with rubber bushings so there is some play. If it bothers you there are poly replacement bushings.
Does it rattle all the time or when you hit a bump? Need more info.
The rattle could be loose tank bolt- put a wrench on it and check. Depending on how many miles it could also be the neck bearings being loose or worn.