Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
You may find Ted that the 500 headlight won't fit on the 400 due to it's shape, you may need a 550 bowl instead and even that may not fit. The 500 bowl won't fit on the 550 for example due to the position of the ignition switch.
Are you going for the H4 60/55 ?Sent from my SM-A546E using Tapatalk