Hello, would hear an opinion about engine damage. History is that the engine was generally overhauled, i.e. sanded, new pistons, rings but since the repair had had a felt power loss. During the last ride much the performance rapidly dropped, max. 70 level distance, dull heavy engine noise. In the workshop they discover that the Catalysator had caused a graft and could hardly escape exhaust gases from the engine. Have removed the catalyst, now gi bt it strong smoke and smells extremely of oil – petrol, there are misfires in the exhaust, at least it sounds like that. Have a video about the current behavior https://youtu.be/yaa434JvtiE?feature=shared I already have a spare engine, but I will look at this and also posts. What do you think is everything in the bucket? Greeting Dani