nightbreakers?

[PaulSmith]

...

No mate, they are actually illegal for motorcycles. Vehicles that don't have a self levelling headlight system on them aren't allowed to have HIDs fitted, to stop them from blinding oncoming traffic users. Although there are a couple of bikes that do have this (the BMW K1600 is one such bike), 99.9% of bikes don't have them, and as such it's illegal to fit HID kits to them. The other big issue is that HID bulbs use a different focusing system to traditional bulbs, and as such bikes that don't have HIDs as standard put out a lot more light, but it's a lot less focused as the bulbs don't work properly with the normal bulb based reflectors.

I'm not denying that they put out a lot of light, but IMO are dangerous for vehicles that shouldn't have them - you're a lot better off IMO getting a decent set of bulbs, they won't put out quite as much light, but are still a hell of a lot better than stock, the light is more focused and won't dazzle oncoming road users at night if adjuster correctly, and also won't fail an MOT if a diligent MOT tester checks your lights properly and the aim is right, as most won't pass a HID kit on a bike, and quite rightly!

Old wives tales that get repeated ad nauseum. That is the sort of bulshit usually spouted by some twat in a pub who had a Norton in his twenties.

Lets take your second point first. "HID bulbs use a different focusing system". What the fuck is that supposed to mean? There is a point on the bulb that is the source of the light. On a traditional bulb, it is the coil, on a HID it is the gap between the contacts, but the point is in the same place in relation to the mounting. That means the source of light is in the same place. Your reflector doesn't care how the bulb is made, only where the source of light is. If you were trying to fit a H3 bulb in a H4 reflector, you might have a point, but that is simply not the case.

Self leveling mechanism? You mean suspension? My bike has one of them, doesn't yours? Do you have a serious problem blinding other road users with your existing lights? Why do you think these would be any different.