Hello everyone!! I hope someone can give me a tip to help me. Own the above-mentioned GS 450 s (BJ. 86), always worked tadelos except yesterday :-(. Was with her the afternoon quite fast on the way and in the evening off the traffic lights heated me with a 600 bandit. Suddenly (so in the 3rd gear just in front of the red) the performance broke in. I know that I’m responsible for so much is clear. So now it looks like this: There is a good 2/3 missing from le istung engine turns only up to 5oo revolutions instead of 9500 engine runs a little more restless than before it does normal and brought me home too. Thought to me at first that it is only running on one cylinder( spark plug defective or so) is not like that. Did first with running engine the one candle shoe then pull off the other and engine continued running. The question I now only put is to get me to the mechanic, to tinker around yourself or perhaps a swap engine as well rgen(Ebay od. so)? Could it be that it is only a trifle though I almost don’t believe it. Would like to thank me for your help now. lg Herbman