Previously, I was having problems getting my ER5 to work at all. It wouldn't start on the button, despite it being on the optimate, and so on. It turns out that it was the little circuit that sends the power to the battery was chucking out 19V, rather than the 14V it was meant to top out at. So a trip to see the man (one new circuit board, chain and sprockets battery later, and it was all running fine again. The old battery was a sealed one, and had actually swollen inside, which might have been a result of the wrong volts, so it's probably good that it stopped working). So thanks for the help and advice then... As 6 weeks is obviously far too long a time to have a fully functioning motorcycle, the speedo stopped working today on the way in. So, it's out with the Haynes manual tonight and over the weekend and try to see if I can fix it, or I'll take it back to the man and get him to do it, and change the back tyre at the same time. Stupid question (#76 in a series): Do you need to change both tyres at the same time, or have I got this idea into my head from somewhere? Also, how much is it going to cost, so I can get an idea if I'm being ripped off or not?