Can anyone tell me how to clean and set the points for a 1975/1976 Yamaha DT 250. After getting the carb rebuilt, new air filter, clean gas tank, I tried to do some extra cleaning and maybe got something wet that I shouldn´t have. The dealer said I needed to clean and set the points, but I don´t know how and I don´t have a way to get the bike to the dealer. Can anyone help?