My new bike has been uncorked' jetted etc and some people say to play with the mixture screw to find the sweet spot. On my bike between 1\2 and 2and1\2 there seems to not be any difference. How many turns do you guys find is best on the stock carb? I know the book says 1+1\2. My bike has only 200klms on it and it seems to not have a clear sweet spot but this may be normal for this bike being a single cylinder big bore. I dont know. The standard 15\41 gearing does'nt help as its always chugging in low gear.