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Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
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Join Date: Feb 2002
Location: Back in Essex
Mood: Passion Killer
I don't think there is a law, but I think the EC directive is that a bike with twin lights is easily mistaken for a car at distance, thus becomes a danger to the motorcyclist as cars pull out on them.
As Andy says it won't be retrospective but has probably been applied to new bikes from a certain date.