My children have Raptors 90, a 2009 and 2011 model year. The 2011 has the frequently mentioned (here) carb stumbling issues, and it seems to be even worse than the 2009. Will hardly accept throttle without being choked. If someone has the time, and has done this trick before, would you mind explaining in great detail the "washer" method of raining the carb needle? I went back through many threads and dont see more than a general description of how to. Thanks in advance.