I am sorry. I am from Hong Kong. I 've got a 2nd hand MT2 last month and I just buy a new engine for it. The problem comes now. The new engine carb is "slide" mode but not that one of the stock one (rotatary). According to manual, I use the servo horn of #85039 but I cannot fix it well. The opening of carb of the new engine and the brake are not that smooth......

Do your big brother encounter this problem before? any advice??

thanks in advance.