E: Engine - Breather Timing: A long description of a different way (Part 1) | Vincent H.R.D. Owners Club (vincentownersclub.co.uk) Here is a link that takes you to my method of breather timing. Vincent Speet said he used this method and liked the result. I use it and my bike is fairly dry. The only bikes I see around here much dryer are Robert Watsons and Dan Smiths. Right now the main leak I have is in my RFM. I think there is a pin hole leak in one of the welds.