Dear Moto Talk Forum Before a few weeks I had a piston eater at my Piaggio Tph 50. At the repair I changed the piston and cylinder (Polini) and also the crankshaft (Naraku). Then I only filled mixture 1 / 25 and after 300 – 400 kilometers 1 / 50. Roller then ran perfectly until 4 days ago.. I came home and when I went off my garage he just went out and then he didn’t jump any more… He was after I’ve already tried it with brake driver and start pilot in the carburettor but it had no effect. I checked and cleaned everything already. Gasoline valve checked Gasifier cleaned Air filter cleaned Membrane block accountlled New spark plug installed (has sparks) etc… I also measured the compression and he showed me 5 bar. Have a bit of fear that it is too little and that it might be the crankshaftsimmerrings could be I have added new ones to the crankshaft. Could someone tell me what that is? Thanks already in advance. LG Martin