This might help ya, Joe....
http://www.bikerplaza.com/motorcycle-law.html...but all it says in the MA section next to "turn signals" is, "required by law".
And so I'd say you still might want to phone your local MA Highway Patrol sub-station and talk to an officer there to see if your state's vehicle code is more specific in detail regarding this issue.
(BTW...I think those bar end turn signals are pretty cool lookin' too)
