I am going to work on the speedo and tach until the weather gets better. I remember the last time I went through some gauges there was a problem with the old grease turning into tar or sometime. The stuff was so thick that it would stop the gears and strip out the odometer. I remember talking to someone who said if the grease is not too thick to use some brake cleaner gently on the tar along with some wd40 until the gears and disc turn smooth then clean the wd40 out with brake clean then put a few drops of oil on the cable end instead of talking the whole thing apart. I have the guts out of the tach and it does have some tar on the worm gear and does not want to turn around at the cable head. They do turn clockwise, right. Anyways always open for comments. Yes, when this fails, I will take it apart and clean it correctly.