Interesting info on the fuels some of you have used for racing, and many thanks for that....Some of you may or may not know that I am building up a twin road racer to use in anger, based on an original framed 49 HRD Vincent, not a Norvin or other Vincent hybrid special. I would be interested to start a new thread run along the lines of the one run by Craig on his D enclosed upgrades to his Comet. I would be most interested to ask questions to assist me with the build, in particular, upgrades to the oiling system, exhausts, Carbs, and so on. I am happy to post photos etc, to which I would keep you all up to date with how it's coming along. I have a pretty good understanding of normal road bikes, and engines but not a lot on the hop up tricks to a race engine, so come on Tim, Bill, Ed, Max, and all you other racers/ex racers out there.....What do you think.....???? I have already made a huge head start......But I have approx. 4 1/2 months to get it ready for our big race meet in late July.....Any thoughts.......Cheers......Greg.