It was a lovely ride out until I was on the Boroughbridge to York road, and I was following a transit van at 60mph. All of a sudden a sunken manhole appeared and my front wheel hit it with such force that my steering locked up. It was the same sensation as having a flat front tyre. I managed to get the bike stopped and checked to see if I had a flat tyre, but no it was fine.
I went around the bike looking for the problem but couldn't see anything. I then got sat on the bike and got hold of the handlebars and turned them to the left and something clicked/clunked, and then the handlebars freed themselves. I rode home at a steady pace because it felt very weird. After arriving home I got the front wheel off the floor and and checked for play in the head race bearings and there was a lot of play. It seems the bang has damaged the roller bearings. I was very lucky that I was on a straight bit of road.
If I'd have been going round a left hand bend I would've gone straight on into oncoming traffic or a field.



I have a brand new spare set of headrace bearings, so that's my weekend sorted out.
Here's a few photos of the day.
























