Our oldest son has been alternating between mine and my wife’s bike (Carreras from Halfords) whenever he has to go anywhere, but over the last week or so we noticed he had stopped using my bike, saying the other one was more comfortable. I was moving the bikes into the shed last night and noticed that the stem cap and bolt (think that's they're called) are missing!! Don't know what he did and I've not had a chance to talk to him about it yet. Here is a picture of the bit I'm talking about:
Is this an easy part to source and is it difficult to fit correctly? Am I better just taking the bike into Halfords and asking them to fix it (assuming they can)?
Thanks Swifty, didn't notice I'd posted the wrong picture. Here is a better one, it looks like there should be something inside the star. The bold is just spinning.