The secret of happiness is to find a woman who is loving, a woman who is kind, a woman with a good sense of humour and a woman who is faithful.

And to make sure those four women never meet.

The secret of happiness for motorcycle manufacturers, meanwhile, is to create a great engine, then use it in a variety of bikes.

Well, Harley got the first bit right with the smooth but characterful 1250cc beast in its Pan America, launched earlier this year and a very impressive first pop at an adventure bike from a company best known for