[Darren69]

I wouldn't rule out an ECU or TPS failure as it sounds like it could have been like that before you bought it and you only have the sellers word that it was running ok before. i giuess it would be a good time to call in an expert if you know one, it's usually something fairly simple but not fairly cheap to fix. Presumably you got the bike cheap because it was a non-runner, so you should still be quids (euros) in? Most things are about 100 bucks to fix plus labour.