After mislaying the key that I normally use, my 2001 Type-V worked fine for 30+ journeys over 4 weeks using the 2nd key. However, now for 3 out of every 4 attempts to start her the immobilizer warning light keeps blinking at me, the engine turns over and she won't start. The battery voltage was a bit low in the cold weather when this started but a fully-charged battery makes no difference. I see from a search that the barrel is a potential problem, but she's done less than 50,000 miles, the barrel is pretty firm and, in any case, I don't see why a loose barrel might stop the inductance loop from reading the key's chip. Before I tear my house looking for the main key (top tip: always hide your keys away from kids who like to play hide and seek with dad's things) to see if it's a key issue, does anyone have any advice for me? I'll post up here what I find out for the benefit of anyone else who might have the problem.