Has anyone else experienced the handle bars shaking on their xj600s diversion? It happened when i took my hand off the handlebars to stretch my back as my backpack was quite heavy. I was going around 30 mph.

Check your wheel balance and the state of your bearings, head stock and wheel bearings, to make sure they are not worn then see if you have lost a weigh from the wheel from the last time the wheel was balanced, they are only stick on things and can fall of if you power wash your bike. Nothing worse than a tank slapper especially if you doing any real speeds.

Check your tyres for damage, too.

and tyre pressure

Ok thanks guys

and head bearing tightness

and head bearing tightness

It's usually this^

Nice one. Much appreciated

very helpful... thanks

but actually they just do that, when it happened to me in a bad way on an xj600n there was a strong cross wind,

thing is, apart from the recommendations above, to keep a reasonably firm grip on the handlebars when riding.