Well, bikes are just like people. Some do always do a certain thing and some never does it!
A Velocette colleague fitted a tap to his newly rebuilt Viper and, when I asked him, he told me that he would never forget that tap! A year or two later I spoke with a man, who was then dealing in Velocette part. Just by chance we were talking about oil taps. He told me that the man, who was so positive about never forgetting, had ordered parts that should be sufficient to fix a major seizure! Never trust your or anybody else’s memory too much!
Seem to be a quite a few of us that has both Scotts and Velocettes, one can wonder why?!