In a recent story in KPHO Channel 5 Phoenix "Some Harley Motorcycles Plagued By 'Death Wobble'- Riders Blame Design Of Certain Models", some local riders are complaining of a design flaw in Harley Davidson Motorcycles. They call it, ominously, the "death wobble". It is also known as rear steer and tank slap.
According to some riders, the motorcycle can start shaking at as little as 25 to 30 mph. It is such a danger that even some very experienced and well trained riders, motorcycles officers in fact, may have been killed as a result:
Harley-Davidson does acknowledge that its bikes are susceptible to a weave or wobble -- depending on the bike's speed. But they said that this does not cause accidents, and that weave or wobble happens to other bike manufacturers, regardless if it is a Harley or not. Harley also said the wobble problem is worsened when riders add on certain parts and suggests people follow the owner's manual.
In 2002, 30-year-old [police officer] Charles Paul was thrown from his Harley Electra Glide after it began to wobble. He died, and his family later settled a wrongful death suit with Harley-Davidson in 2008.