I got pulled over for having a bouncing headlight beam.
Of course that was on my 49 HD panhead but it was stock and back then the headlight was rubber mounted.
so
The head light beam would tend to bounce up/down if the bike hit a bump.
It turns out (this only happened once) the CHP officer was a motor-cop on the golden gate bridge (SF & Bay Area, Calif.) and used to ride a 49 pan. He just wanted to see my bike.
Oh yeah ... He took back the ticket at the next offramp.

Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe
Every Shaver | Now Can Snore | Six More Minutes | Than Before ... | Half A Pound for Half a Dollar | Spread On Thin | Above the Collar || BURMA-SHAVE