Thanks Bob, did you have to change the coil as well? I have been looking at the dizzy sets and they are about £35, a new dizzy set up is £52 so the extra I think is worth it. But I am not sure whether to uprate the coil or whether, I am going over the top. Good luck with the engine rebuild, my experience so far is they don't seem to like sitting around things have been dropping off and breaking down at an alarming rate. so I am slowly changing bits on a weekly basis working from the front backwards.