hid .. you mean headlights? no good..i had em in my bike.. and everytime i would wheelie and land it woudl shut off.. i broke like 3 ballasts until i could not afford it anymore.. i took em out.. i got some pis hid bulbs..as long as they piaa brand you will get the best look..
Wait, so your saying "jerking/jarring" the ballast assembly caused the lights to burn out, or just shut off momentairly? How hard are you dropping your bike down? Did you retrofit a set of projectors into your bike? Or did you just put the bulbs in the stock housing? What brand of ballasts and bulbs were you using? The reason i ask so many questions is because i have never heard of this happening to anyone, and i have agutally been talking to "budlightinmyhand" and he has put a set of Hi/Low 10000k bulbs in his 03 600 (not a retrofit) and hasn't had suck problems. Oh yeah, he got the kit from HIDynamic.com for like $270 to his door.
Just my .02 but i really don't see the problem being the ballasts but probably the actual bulb itself...
any movment of your hid bulbs can bust em.. i broke many bulbs just going over bumps.. im tellin ya its a waste of money.. and then they would shut off than turn on.. as the gas on the bulb moved around.. im done with hids.