Folling up from the adventures of last month, I bought a new batter and all was well again. Until this morning. Pressed the starter, and the engine fired up, ran for about 10 seconds, then died. Tried again, several times, all sorts of different amounts of choke, nothing. The starter turns over, occasionally now, but the solenoid is making an angry clicking sound. It also needs a new chain as it's at the end of the adjustment span. It's probably a good idea to change the sprockets at the same time, isn't it? So tonight, I'm going to have a look at the spark plugs as that's the only thing I can think of at the moment. Any suggestions would be gratefully recieved. I hate it.