Can anyone recommend anyone in the South Of England who is an RMZ250 specialst. I have had numerous starting problems which were related to the jetting. Last week I checked and shimmed the valves on the intake side. At that time the decompressor was working fine. I took it out for a couple of hours today and after coming off it was impossible to start. I've checked and the decompressor arm is bent I now need to find someone who can get to the bottom of the problem.