Hello, My cosa 200 CL ('89 VSR1T0003XXX)stops after while (few km), and also in neutral at high revs 7000rpm. I posted before about this problems a the first thought was not enough fuel. But it seems that the piston locks in the cylinder. On a dutch forum there was a suggestion that the fuel mixture was to poor. I have searched this forum and used the cosa kompendium but do not fully understand or can't find the exact answer about the best/right settings for the carb. I'm using the standard air filter box and my settings for nozzles are: Luftdüse 160 Mischrohr BE6 Hauptdüse 92 Nebendüse 48/140 = 2,9 In some post it is advised to change 160 in 140. But in the cosa kompendium a BE3 is used instead of a BE6 ? Is the 160 advisable or is it better to change to 140 and can I do so without any other adjustments ? Jacob